Ada O wrote:
... i just got the 13 inch Macbook pro retina display and it is yummy!
Yes it is!
Just use it. The Mac already comes with everything you need to enjoy it.
Go to the iTunes Store and preview some movies. They will look good in HD on your Retina MBP.
Play with FaceTime. You can call friends anywhere in the world who have a Mac, iPad, iPhone, or an iPod Touch.
When you accumulate a lot of photos, emails, and other stuff you don't want to lose you will probably want to back them up. Your Mac already includes the software to do that (Time Machine), and to use it just requires an external hard disk drive. You can buy a 1 TB hard disk from any number of places for < $100. Plug it in once in a while and Time Machine more or less does the rest. If your Mac were to ever just stop working one day, tomorrow or five years from now, having a backup will make that a non-event.
Any music, apps, videos or movies you purchase from the iTunes Store are yours forever and you don't have to back them up.
Lastly ignore all advertisements for products that claim to "clean up" or "protect" your Mac. They are extremely prevalent, their marketing techniques are highly aggressive, and they account for the vast majority of Mac problems reported on this site. All that junk will do is make your life miserable. If your Mac should ever do something odd or unexpected, the first thing you should do is call AppleCare, followed by asking for help on this support website. No other company has a similar resource that comes anywhere near this one, and it's free forever.
Don't spill anything onto your keyboard. Keep any liquids an arm's length away from your Mac at all times. Liquid damage pretty much accounts for the remainder of Mac problems reported on this site. The repair is prohibitively expensive and it's not covered by AppleCare.