My mom and I share a book of recipes where we keep all the things we intend to make, or things that have turned out so well in the past we have to keep them handy at all times. Or, maybe I should say that my mom has a book of recipes, and since I've been cooking I've adopted it as my own as well.
Her recipes are mostly Penzeys clippings, recipes she's gotten from friends, a few things she's jotted down but definitely doesn't need a recipe to make, like paella and squid ink rice and pulpo a la Gallega. My additions are recipes for tarta de Santiago, brazo gitano, and hordes and hordes of different American brownies printed out on brightly colored scraps of paper. We've run out of pages at this point, and I've just started sticking folded-up recipes in the back and hoping they don't get lost.