Almost all smartphones are coming with touchscreen. As the display is very expensive it should be taken care of. So here are some steps that should be kept in mind.
If your phone is slippery, there is much the chances of falling of your phone. So to prevent it you can use thin flexible cover so that you can safely hold your phone.
If you keep your phone in the bed after using it at night then you should avoid it. Because while sleeping by mistake if you come upon your phone the you know what the results will be.
Dont keep the phone on your upper pocket .
Use tempered glass if your phone does not have gorilla glass. Tempered glass protects your screen from external forces.