To easily make friends, get your guitar skill to 5/10. Then, go to the park and select "Play For Tips". People who watch you will become your friends. The higher your guitar skill, the faster they will become friends with you.
Read "Easy Cooking, Gardening, or Fishing Skill" by Tony Ortale and repeat Tony's steps until each skill channel has been viewed. The Sim will continue learning the three skills as he or she goes on about their daily life, and four when doing skill activities.
Flirt with someone a couple times (you don't need to have a proper relationship yet) then lay on the bed. Invite them to cuddle and then get busy. Afterward, get off the bed and kiss them before trying for Baby. After this your Sim will start to throw up every so often; don't let them eat bad food. If your sim would rather be a single mom, you can always leave the other sim if a relationship has started by this point. You can also start a proper family. Use the cheats already on this site to determine whether the baby is a boy, girl, twins triplets etc.
To easily earn money, have your sim write novels on the computer. Fiction novels take the least amount of time, but will not bring you the most Simoleons. Romance novels will earn you the most Simoleons. After maxing out the "Writing" skill, you can make as much as 40,000 Simoleons every week.
To perform this trick, you will need a TV with the Cooking, Fishing, or Gardening channels and a video game system. Have one Sim watch TV on any of those channels to start earning skill points. Then, have a second Sim start playing video games on that TV. The first Sim will continue to earn skill points. Allow the Sim to sit their until they move on their own. The skill meter will continue to stay above their head. If you repeat the steps until the Cooking, Fishing, and Gardening channels have been viewed, the Sim will be learning three skills at once.
To make a Ghost baby, set one of your female Sim's traits to Kleptomaniac. Go to the graveyard, and have the Sim steal male remains. A ghost will appear 11:00 P.M. and disappear at 4:00 A.M. on the second day after stealing the remains. It will continue to appear every other day. Socialize with the ghost every time it appears and become best friends with it. Get the "Fertility" award and confess your attraction to the ghost. Ask the ghost to snuggle on the bed, and kiss him. Try for a baby every night and you will eventually have a ghost baby.
Note: Enabling cheats will disable challenges and achievements. However, the game gives you the option to save your neighborhood before the cheats were activated to resume from there later. To enable cheat mode, load your family in a house or location, then press Start. Then, hold RB + RT + LB + LT' and the cheats instructions will tell you that Spot is now available under "Decor-Miscellaneous". Place him in your lot and all cheats can be used.
To avoid dying, go to Pleasant Rest Graveyard and harvest the flowers from the "Death Flower Bush" which is located near the gate. After you die, your Sim will give the flower to the Grim Reaper and become resurrected. This flower will not reappear there again. However, it is possible to grow the "Death Flower Bush" if your Sim has Level 7 Gardening by planting the "Unknown Special Seeds" found in the graveyard.
To learn bookcase skills for free, buy a bookcase and have your Sim begin to study. Interrupt your Sim so that they place the book on the ground; then sell the bookcase. You can use the book that is on the ground to do everything the bookcase can do.
To get unlimited pizza, have a Sim call for Pizza, and when the delivery man arrives, do not accept the pizza. The pizza will never get stale. Continue to do this and the delivery man will stack the pizzas on top of one another.
To quickly earn over 4,000 Simoleons, purchase a desk and a chair for the desk and place it anywhere in your household. After calling the repairman a couple times he will bring a XS 4258p Laptop and place it on the desk. He will forget it is there when he leaves, as long as there is no other items on the desk when he arrives. Repeat this process to earn you between 2,400 and over 4,000 Simoleons, depending on how soon you sell it.
On a new lot, put down staircases to lower the terrain. Go to the bottom of the first one and miss out one tile and put down another staircase. Do this once more and you should have three staircases. Get rid of the staircases and use the "Level Terrain" tool to level the terrain from the lowest tile. Set it as big or small as desired. Using the "Straight Line Wall" tool, build walls around this hole so are walls pressed up against hills. Be sure to build the room above so that it covers the entire basement. Cover around the house with the "Foundation" tool, assuring that all the slopes are covered up. Place one tile in the top floor, then create a staircase leading down to the basement. Make two or more foundation blocks at the front of the house, and finally place a staircase leading up them.
ACHIEVEMENT - HOW TO UNLOCK Baby Steps (5 points) - Create a household. Graduated (5 points) - Complete the in-game tutorial. How you Doin'? (10 points) - Learn the Charisma Skill. Wishful Thinker (10 points) - Complete 10 Wishes. What Goes Around (10 points) - Use a Karma Power. BFF! (10 points) - Make a best friend. Sim About Town (10 points) - Attend a town event. It's a Date (20 points) - Go on a date. You Never Forget Your First (30 points) - Have a first kiss. Woo Hoo! (40 points) - Make Woo Hoo. Climbing the Ladder (20 points) - Reach level 5 in a career. That New Car Smell (5 points) - Buy a car. Not Twice, But 10 Times (20 points) - Complete 10 Opportunities. This is so Meta (5 points) - Experience the Meta. I Double Dare Ya (5 points) - Explore the catacombs after dark. Sim-Author (10 points) - Write a book. Epic Party (20 points) - Throw an awesome party. Partners in Crime (10 points) - Become a partner of the Paragon Personal Private Charity Warehouse. Stylizer (15 points) - Design and save 20 styles using Create a Style. The Big Proposal (50 points) - Get engaged. Movin' On Up (40 points) - Move into a new home. Expertise (25 points) - Reach level 10 in a Skill. Once a Parent, Always a Parent (40 points) - Welcome a child into the family. Working Friends (30 points) - Become best friends with your boss and all of your co-workers. Be Excellent To Each-other (15 points) - Reach the maximum potential Karma. Dream Big (50 points) - Complete a Lifetime Wish. Home is Where the Simoleons Are (10 points) - Raise your household's value to §35,000 or more. Not Dead Yet (10 points) - Resurrect a Sim. Power Overwhelming (25 points) - Unlock every Good Karma Power by purchasing them with Challenge Points. Mad Skillz (15 points) - Complete any 2 Skill Journal Milestones. Leet Skillz (25 points) - Complete any 10 Skill Journal Milestones. Genie (30 points) - Gain 150,000 Lifetime Happiness Points on one Sim. But it's Inflammable! (10 points) - Extinguish a Sim on fire. The Reviler (30 points) - Become a public menace. Epic Fail (15 points) - Use the Epic Fail Karma Power on 13 unsuspecting sims not in your family. Matchmaker (30 points) - Start 5 romantic relationships. Fit For a King (15 points) - Prepare a perfect meal. Owned! (15 points) - Buy out a commercial property in town. Pyromaniac (20 points) - Get an insurance check for over §15,000 after using the Firestorm Karma Power. Botanical Perfection (15 points) - Grow a perfect plant. Trophy Fish (15 points) - Catch a perfect fish. Happiness... It Stacks (15 points) - Get 5 positive moodlets at the same time on one Sim. Master Architect (20 points) - Build a home of at least §350,000 property value on a large lot. Child Prodigy (20 points) - Complete a Lifetime Wish before becoming a Young Adult. True Wealth (25 points) - Gain 250,000 Lifetime Happiness on one Sim. Challenging (20 points) - Complete 50 Challenges. Very Challenging (25 points) - Complete 100 Challenges. Uberchallenging (30 points) - Complete 150 Challenges. Wish-Master (25 points) - Complete 100 Wishes. Miracle Worker (30 points) - Complete 1,000 Wishes.