Wont start

I realize this may sound kind of simple and probaly is not your problem But, try taking your battery cables off and cleaning the battery post as well as the cable ends. I have had this problem with so many different vehichles, and for me anyway, even tho the battery was good and the cables were tight, the corrosion kept them from getting good contact. I could turn the key, and nothing, as if it didn't even have a battery in it.