So I've decided on getting a new MacBook Pro base 15" model, and I am SUPER excited to get it. It is going to be a great computer all the way around and will be a nice step up from my current system (see signature). My only question now is what I should do with my old MacBook. I don't want to sell it, recycle it, or give it away, because I still want to be able to use it as a backup computer in case, God forbid, my MacBook Pro is a lemon. What do all of you use your old Macs for? I was thinking maybe getting an external drive and making it a file server or maybe using it as an HTPC. What do you all think?