If you've ever used an extension cord, you've no doubt experienced the heartache (yes, heartache!) of pulling a few inches too far and disconnecting from the cord. Carpenter Robert Robillard explains how to knot your extension cord to keep your cords plugged in -- a simple trick he learned his first day on the job.
The image kind of says it all. Just hold the two cords together, tie them in a simple overhand knot, then plug in the ends. The benefit of the method pictured at top -- as opposed to the common alternative pictured at right -- is that when you inevitably apply some tension to the knot, the strain is diffused by your knot and not placed on your plug connectors (which means less chance of shorting your connectors).
While you're polishing up your cord-knotting skills, check out how to use a daisy-chain knot to resize or store spare cords without the clutter.