I would say whatever you do, start small and stay small, sounds like you're making a larger image, and then trying to resize.. Instead, start with the size you intend to end with, takes some practise working that small, but you'll get there in the end.. Just zoom up and down a lot to see the results you're getting. Try taking a close llook at other smilies you like too, see how they get the effects they do (working in small sizes there are a few techniques it's good to master