I like sealing wax. Okay, I know I take stationery and letters a bit more seriously than most people, but I like the look of a sealed envelope. Except that real sealing wax isn't easy to use. The wick never burns properly and the wax doesn't melt evenly. The wax stick drips, and I always end up with a misshapen glob that's charred on one side.
When I visited Paper Things, I spotted this. It works like a glue gun, but it maintains a lower temperature, and melts specially-sized sticks of wax. I was able to lay down a perfect circle and stamp it ... finally, success.
I realize this isn't high on most lists of "gotta have it," but if you're like me and you like to play with pens and paper, this is a simple, inexpensive way to make your letters look fantastic.