Here are some ideas of ways you could paint your nails:
You can paint polka dots with a toothpick dipped in nail polish and then carefully dotted on your nails. You could also use this method for making simple flowers. I have also so seen nail markers at Claires that you could use to make designs.
Another idea is that you could paint each of your nails a different color. You could make it rainbow or random. 🙂
I add more ideas soon! 🙂