Don't do away with those doodles and mini paintings that you do on small bits of left over art papers, if they're half way decent, they'll look great when mounted onto a card blank. I tend to 'practice' all the time on papers left over from a project (because I hate to waste the paper), and I've discovered that sometimes these doodles and practice pieces don't turn out too bad. If they are worth saving, I'll trim them down and mount them on the front of a card. They're like mini pieces of original art ready to be mailed off to someone special.