Gaffer's Tape

Move over duct tape — Gaffer's tape is as versatile as its space-age cousin, but looks nicer and doesn't leave behind a sticky, messy residue when it's pulled up. Absolutely indispensable when you're attaching your inventions to something valuable, like a brass instrument or someone else's carpet, Gaffer's tape rips easily but secures firmly. The catch? It's pretty pricey, about $20 a roll.