Turns out, a stud is more than just an embellishment that makes your clothes look edgy or a hot guy. It's also a piece of metal or wood supporting your walls that you can use to hang things even if the wall material itself is too flimsy.
This handy gadget uses a magnet to help you detect them, and over 7,500 Amazon reviewers swear by it. It also has a built-in level you can use for hanging once you've found the stud.
Promising review: "I got tired of my electronic stud finder and figured there had to be a better way! This little, inexpensive tool did the trick and did it fast. Here are a couple of tips for using it with drywall. Remember, you're looking for wall studs — vertical two by fours typically about 16 inches apart. The drywall is attached by nails with flat heads. The magnet in the level finds them for you. Just put the tool on the wall and sweep it left and right (in around 20-inch sweeps). After each sweep, drop the device down about an inch or so. After a few sweeps, the magnet will find a nail. It'll be obvious because the magnet will hold tightly to the wall. After you've found your first nail, the rest is easy. Usually, the nails are at about the same height on all studs, so just go over about 16 inches and run the level around in little circles — you'll find another nail. It's actually kind of fun!" —Al
Also, bear in mind that if the magnet is sticking to a larger stretch of wall, not just one area where a nail would be, you may have found a pipe, so don't drill there!
Get it from Amazon for $7.99.