Clipdiary. You won't use it really often, maybe, but it will save your bacon when you need it to.
You hit Ctrl+C and copy something important. Get sidetracked, and copy something else. Ooooh... Lost that first thing? Gone forever? Hours of work?
Okay, you're a monkey for not pasting it immediately. But that happens sometimes, to all of us.
If you have installed Clipdiary, a FREE tool that stores your clip history, no problem! It just sits in your tooltray, on the bottom right of your screen.
You can delete individual entries from the database, set a database size limit, purge the whole thing, toggle it on and off... It's perfect. An absolutely great tool that everyone should have.
It's already installed on my machine. So I really hope it's not actually a mind-control tool that will turn me into a zombie.