Here's a great tool for agile development that was mentioned in a blog post below.  Go get a stack of these!  Shuffle them, pass them around, put your use stories on them, and slap them up on the board when you're ready!  Here's one more link.

Post-it® Sortable Cards only stick when you want them to! Now you have the flexibility to visualize and organize when and how you want on many different surfaces. Cards also easily sort, shuffle and stack together so you can use them again, or store them for later.