Your passenger gets excited and gives you more money when you pass other drivers on the road.
When taking people on the freeway, weave in and out of trucks, buses, and cars. Your passenger will get excited and give you tips. Be careful not to crash.
When you have a customer, you can occasionally go against a wall or a solid straight side and ram side by side against it. If done correctly, you can get a Crazy Drift combo even if you did not do one. You can get up to an 8-combo. This works well by KFC with Gus or B.D Joe.
Pick up the girl that is waiting at the car store and ride through between the car aisles. She will scream "Yeah!" and cash symbols will begin to surround you car.
Go to the used car shop with a customer and drive through the center of the two lines of cars to get a lot of tips.
Drive in the exact center of the road with a passenger. All of the cars on the other side of the road will pass you, and you will get more money.
At the beginning, drive in reverse instead of going forward. Pick up the passenger who will pay you $700 for a ride to the bottom of the hill.
Go up to the roof of the parking garage by driving up the ramp on one of the corners. To the left will be an old woman standing on an umbrella. Give her a ride to the police station for almost $1k.