Just got my Suface Pro 2, now what?

I've been struggling to get my surface pro 2 despite preordering it on September 24th.

After spending 13 hours on the phone with their horrible customer support I decided it would be best to cancel my order and go into a local Microsoft store and buy one in person instead of online.

I'm on my way home with my Surface Pro 2 (256gb) and am wondering what I should do first with it.

I plan to install office and adobe suites and unity3D on it, but after that I have no clue, any suggestions?