How to power nap without oversleeping?
Want to take a power nap – but don’t want to risk sleeping too long, and feeling groggy for the rest of the day? Take what experts call a “drop nap.” Sit in a chair and hold an object that, when you doze off and drop it on the floor, will make a loud enough noise to wake you. So something like a heavy book – or an empty plastic tumbler. That way, you’ll know you slept because you dropped it – and you won’t sleep too long.