Magazine holders on bookshelves as yarn storage == brilliant! You'd feel like you had your own yarn shop at home. Down side? The significant other who doesn't appreciate your zeal for all things knit/crochet would know how much yarn you have :-/ oh well!
upcycle an old suitcase into a craft Supplies Holder! I absolutely LOVE the idea of clear lidded containers fixed into the suitcase lid! A few suitcases with specialised craft supplies (like sewing) would be sooo handy.