My iPhone screen just broke, what should do?

I have a iPhone 4s with no warranty and I can't get it replaced, so I was wondering if I should put on a screen protector on my phone to prevent further damage. So should I put on a screen protector, and what tips do you have for someone who has broken their iPhone?

Get a new screen installed. Look up local cell phone repair, should be under $100 and take about an hour.