When you get a set of dies, especially if they coordinate with a stamp set, make a copy of them while they are still on their original carrier sheet. (The photo at left is missing one of the dies because I was using it for a project; the copy at right shows all 10 dies.)
Once you've made the copy, cut the paper down to 5"x7" and then slip the dies into the front of the stamp case insert. That way, you will always be able to see which dies coordinate with your stamp set!
Tip #3 will show you how I organize dies that coordinate with a stamp set by keeping them together.