In one sentence, describe what the following article is about:

Hold the file along the flat portion of your nail to make the edge as smooth as possible. Move it in short, horizontal motions, making sure that you always guide it in the same direction. Avoid moving it back and forth, or else you could make your nails weaker.  Try to use a new emery board, as this will be more effective than an older one.  You can also use a glass nail file, which is easy on your nails. When you rip or tear at your hangnails, you create an open wound, which increases your risk of infection. Instead, use nail clippers to clip along the base of the hangnail.  Don’t chew off hangnails. Along with the ripping of your nail or skin, chewing them off transfers bacteria from your mouth directly into the wound. Your nails will be a lot cleaner and stronger when they’re maintained properly. Since cuticles protect your nail bed from bacteria, you don’t want to trim or chew them off in any way. When you pick or cut at your cuticles, you increase your risk of infection, which will make your nails much less healthy overall. Rub a pea-sized amount of oil into each finger, making sure that it completely covers each cuticle. Use your hands to rub the oil into each cuticle. Use this product whenever you paint your nails, as it makes it easier and safer to push your cuticles back. You can also use cuticle oil as a regular moisturizer. You can find it at most beauty stores.

Summary:
Use an emery board to buff your nails in a consistent direction. Clip your hangnails so you won’t damage your skin or nail bed. Avoid cutting or picking at your cuticles. Nourish your cuticles with cuticle oil.