What's the best way to prevent my iphone screen from shattering?

I just received my first iphone. And guess what i accidentally dropped it 3 days later on some tile floor. Its in an otterbox with an invisashield screen protector and everything, but the screen still shattered. What can I do in the future that will protect my screen better! Yes I know not dropping it would be a good start.

Try the lifepoof case its pretty cool you can take it underwater and stuff. It covers everything inluding the screen. Its a little annoyig to type on at first but you get used to it

Wrap your iphone in a metal case, that would be protective