I can has Macbook? Pro?

So I've been in the market for a new computer for a while. My current computer (an HP) has been fuzzy for a long time. The big problem (among several smaller ones) is that it overheats very easily, and the fan is super super noisy. So in order to get anything done I have to accept the fan running in the background, take out the battery, and prop the whole thing up on top of some books to facilitate air flow.

Anyway, after many months of hemming and hawing, I finally have a 13" Macbook Pro. The problem now is that I don't quite know what to do with it. I work on Macs at the office, so I know my Mac basics. But this thing is so... shiny. And thin. And I seem to have been hit by a sudden attack of HP nostalgia, missing (in advance) my 15" screen and the current setup (cozy, if occasionally aggravating). I am entrenched in the familiar. This Macbook Pro, which is currently sitting innocuously on a set of drawers, happily charging away, is an imposter. I'm almost scared to touch it.

I suppose part of my reluctance to get it all set up is that I'm afraid of losing data on the transfer (not least my novel draft, but also my other WIPs, music, etc. etc. etc.). I have an external hard drive so it shouldn't be a problem. It's just the getting started that's the hard part.

Do any of you have tips for getting through all this transferring nonsense and setting up the new computer? I'm sure that once I actually start using it I'll be zoinks!amazed, but right now it's hard to fathom resigning my current trusty (if LOUD and ANNOYING) PC to the backup closet.