Remove a Stripped Screw with a Rubber Band
Use a bigger screwdriver and insert a rubber band between the bit tip and the screw-head to give you some traction. [Apartment Therapy]
Never use scissors to cut sandpaper, because it dulls them. Instead, place the sandpaper rough-side down and hold a hacksaw blade where you want the cut. Then tear the sandpaper off, using the teeth of the saw blade as a serrated edge. [Steve Kraak, submitted to firstname.lastname@example.org]
Using a permanent marker to color code rows on a breadboard makes wiring common chips easy. [Nick Ames]
For creating an airtight seal on open tubes of caulk and sealant, roll the tip in melted wax. This prevents the remaining contents from curing or setting up. [Harlan Loomas, submitted to email@example.com]
In Case of Burn
If you're new to soldering, keep a glass of cool (not cold) water by your soldering station in case of soldering iron burns. Really.
Milk Crate Shelf
Screw a milk crate to the wall for a quick and easy self-enclosed shelf!