Welcome to iMore and thank you for choosing to be a part of this community. I also want to congratulate you on getting your new iPhone. I'm sure you'll enjoy it like we enjoy ours. In the meantime, please take a moment to familiarize yourself with the Community Rules & Guidelines. In regard to the tips & tricks, I would recommend you start with the 2 following links:
Welcome to the iMore forums ... be sure to check the "sticky" threads at the top of the iPhone 4 and the Apps forums... there’s a lot of good information here...