iPhone

After going way too long without a properly functioning phone, I finally got myself an iPhone 4S yesterday. I'm excited to explore all it's features and available apps. So far I've downloaded TeuxDeux, Instagram, Pandora, and Evernote.  I know a lot of you out there are iPhone users. Which apps do you recommend?? Any tips or tricks I should know about?

I've been shopping around for a stylish case and I'm loving these:

1- j.crew, 2- kate spade, 3- dvf, 4- anothercase, 5- dvf , 6- dvf