Many artists I know keep sketch books and carry them with them wherever they go. Personally, I've never felt comfortable drawing in a book. I always feel constrained by the spine and the curve of the paper, basically it just doesn't feel right. So I sketch on loose leaf paper and keep them on file for reference. One of the best parts of my job, is getting to see drawings that I might have done one night at 3 in the morning, turn into a rockin pieces of jewelry! The final designs don't always look like the sketches, but in this case, they came out pretty darn close! These two designs above are probably going to end up being pendants for necklaces.