-When you reach the main world, fight as many Jelly Beans as you can. If you are not going to be a dealer, sell them for easy money. If you are going to be a dealer, keep them until you can make items, then sell them.
-While on Nooblet Island, kill until you get plenty of Jam +5. Sell them at Zant, then store it at Crow. After that, use your other character and take out your money or items.