Hands adjusting audio equipment in a home setup - Renata Angerami/Getty Images It's a phenomenon we've all experienced at some point or another. At first the idea of having to unbox and assemble that new bed frame, bookshelf, or treadmill seems daunting and like a huge inconvenience. Yet on the other end of it, having built it with your own hands, you're left with an afterglow of accomplishment where you feel better about yourself and about your purchase.