There's nothing quite like the thrill of a new phone, unwrapping it and treating it with the upmost care for approximately two weeks before the newness vanishes.
After that most of us become a little bit less careful with our iPhones, often dropping them or charging constantly as the battery deteriorates.
This is rarely a problem, unless that drop ends up smashing the phone, but you could be unknowingly setting yourself and your Apple device up to disaster with common mistakes that are easily avoidable.