Handy Mods/Inventions

[Lockeownzj00]

From the handy to the completely inept, what are some little trinkets you've forged before, whether a full-on, badass mod[/, or something you just made work (like the auto lockpick)? It can be something little and logical, but just a personal victory--IE:

Today, my cell phone antenna broke off. Distraught because I really didn't feel like going to the store, I rummaged the house for old phones--lo and behold, an old, unused phone from a year or two ago. I unscrew the antenna, shove it in where mine used to be, tape it up, and now I get a better signal than before.

Woot! So, anyone? It can be along the lines of Lifehacker, too.