Just ordered a MacBook Air... now what?

OK, so I've just ordered a 2013 MacBook Air from the Apple Store, and should be getting it by the weekend. It's my first mac, and while I'm guessing I won't have any of the bloat ware that occasionally is installed on Windows laptops, what would you say are the things I should do when I first set up my mac? What are the best apps to install? Is there anything I should change in the settings to increase performance or free up disk space? Let me know in the comments below!