We move around in bed (for one reason or another), and our sheets don't always stay where we want them. If you don't want to put your sheets back in order every morning, you just need some suspenders to hold them in place.
Redditor sparetire55 came up with this awesome solution:
Step 1: Get some suspenders
Step 2: Put fitted sheet on mattress
Step 3: Attach suspenders under mattress (between boxspring and mattress) to each corner of fitted sheet.
Step 4: Enjoy a good night's rest!
Not a bad hack if you happen to have some old suspenders lying around.