What is one thing you purchased to increase productivity, that you can't go without



1. tri-monitor set up
2. office with a door that locks...I didn't purchase that, per say, but it sure amped up productivity to not get caught in polite conversations about last night's episode of (fill in the blank).
 
I use dual 24" widescreens at home, and tri 19" 4:3s at work... and I'm tempted to throw a 19" 4:3 in the middle of my 24"s at home. The more you can do with screen real estate, the better.

Then there's always energy drinks or energy drinks + jager to help with the productivity, Pandora, and Hypem.com. And an exercise ball as a chair.