One of the best productivity tips I've found—courtesy of David Allen's book, Getting Things Done—is keeping "buckets" for your ideas. In other words, you want to have reliable, fail-proof system to record your thoughts whenever or where ever you might find yourself. I've tried a number of different capture tools and methods: from the notepad "suckered" onto my windshield to the mini-digital recorder that took 7 key presses to record a message. Obviously, some worked better than others, so today I've got five simple-to-use capture devices that will make sure you're prepared when your next big idea strikes.