I really like the Scrapfolios that I've mentioned on the board before. They are lightweight plastic folders with fabric handles that zip closed and have 6-8 divided sections. The nice thing - they are pretty cheap at Mike's when on sale. I try to be thrifty in my scrapbooking (as thrifty as possible) and these are the cheapest solution for me. They keep the 12x12 in great shape, as well as holding stickers and other fun things for me. They're especially great for portablilty!