How not to lose your iphone 5?

Ok so i purchased an iphone 5 from walmart which was 650 and i got it on credit card, so now i i'm having second thought cuz since it is expensive and i didn't put no insurance like if it gets lost or stolen i'm thinking of taking it back i haven't even activated it i don't wanna lose after i payed that much for it, so my question is is there a plan from walmart that has protection if it gets stolen? Or is there an app that can tell me where it is incase i lose it?

Mobile me is a service from apple that can locate lost phones. I'm not sure how much it cost but i would visit apple.com

Just always keep it next to you. And when you put it down REMEMBER hard where you're putting it so much that even if you tried you couldn't forget. And avoid putting it in back packs and purses where someone could steal it.