iPhone question

I've recently purchased an Apple Iphone 4S. It has some really neat applications but it is a learning curve for me. Are there any sites that give instructions on the way to use the app's? Also, What are some really cool apps that most people would use and give some explanations on why they are important?

Thanks,
Shirley


I think this link is what you need. My favorite iOS apps list is forthcoming.


http://howto.cnet.com/8301-11310_39-20120764-285/the-complete-guide-to-ios-5/