What I like to do Polobow is get everything pre-downloaded.
What I mean by that is if you're keeping one of your harddrives I would download everything I need to that harddrive. I send save files to it, I downloaded drivers, desktop backgrounds, exes like Teamspeak, Ventrilo, Chrome and more (stuff you use on a regular basis).
Then once I got my new computer I just put in my old harddrive in and downloaded Windows 7 to my newer, faster one and went to my Computer to my old harddrive and install everything from it and pretty much had everything I wanted back on my computer in under 10 minutes.