Avoid messes and tangles by using a daisy chain when wrapping and storing extension cables.
Extension cords are an immensely helpful tool to have on hand.
They're also very prone to becoming tangled. With extension cables that range from 50 to 100 feet (15.3 to 30.5 meters) long and beyond, a simple task that calls for an extension cable might take two or three times as long if you have even a small tangle.
To avoid a tangles altogether, use the proper way to wrap and store it: the daisy chain.
This may make the extension cord look like a mess of knots, but it actually keeps the cord from getting tangled during transport or storage. This method of storage is used by electricians, for climbing rope and often for parachute suspension lines.
You can also use a carabiner to clip the plug end and loop end of the daisy chain together to shorten the overall length and make it easier to store. You can then clip the carabiner to wire shelving or hang it on a nail or hook in the garage.
To use the extension cable, simply locate the plugs, push them back through the final loop, and pull. The extension cable will come undone very easily and completely free of tangles. Also, if you don't want to use the entire length of the extension cord, you can leave part of it in the daisy chain, and you won't have to wrap the entire cord back up.