How to Build a Simple $50 Standing Desk

Detail of standing desk surface

I'm no stranger to experimenting with my workspace; since I work from a computer for at least 8 hours a day, I try to find ways to prevent RSI and joint pain. I've tried most everything—from über-expensive fancy mesh desk chairs to ergonomic keyboards and vertical mice. But nothing has made as large (and quick) a difference as working from a standing desk.