Today marks National Napping Day, which means it's time to celebrate sleep by taking a nap (or two) during the worst weekday of all, Monday.

But before you settle in to sleep, there are a couple reliable rules you should follow to have the perfect nap.

The best amount of time to sleep for is 20 minutes. If your nap goes longer than that, you run the risk of experiencing sleep inertia, which will actually make a nap feel like the opposite of a strong cup of coffee.

You should definitely avoid taking an evening nap.

I know it's tempting to sneak in a disco nap (the one you take after happy hour and before hitting "the club"), but napping in the evening is more likely to increase your grogginess.

Also, make sure your gadgets are on silent and that your blinds are pulled shut, or else you'll have trouble shutting off your thoughts.

And if you're really having a difficult time falling asleep, sniff some lavender.

If you make it a habit to sniff lavender every time before you fall asleep, your brain will associate lavender with sleep, a la Pavlov's dogs.

For those of you who are down to take your napping to the next level, some people swear by coffee naps, which can ensure that your nap will not end in a desire to take another one.

Instead of perking yourself up after a nice snooze with a cup of coffee, have that caffeine before you rest.

I know it seems counterintuitive, but it takes your body about 20 minutes to metabolize caffeine. So if you have a cup of coffee right before you nap, you'll wake up totally ready to go.

For those of you who think that napping is lazy or feel like you don't have enough hours in the day to take one, there are actually tons of wellness benefits that come from napping regularly.

To learn more about them, watch the video above.