I recently learned that you can almost negate the need for a cord-clip, which prevents the flex from being an awkward length and swaying around as you transport or store your vacuum.
Take a standard Kirby flex for example; usually 30 feet?
If you just wind it around and around, in a large loop, using both hooks, you usually end up with a long trailing length. Too short for one more winding, yet too long to be tidy.
So instead of going round and round, start with two or three figure-eights. Then continue winding in round loops.
You'll need to judge whether you need one, two, or three figure-eights, depending on the length of your flex and the spacing between the hooks.
You'll finish with the plug over the top hook, with just an inch or two of flex to spare.
You'll soon remember which winding pattern to use, especially if it's your daily-driver.