Just about ready!

Oh boy oh boy! I just got myself signed up for Student Discount and in the next few days my mum says I can order my new 15" Powerbook Superdrive! I've never had a Mac but I got converted this year and it's about to happen! A quick side note, should I erase it immediatly and reinstall the OS with only the parts I need? And what's the first thing I should ever do with the Mac? I have Office X, X-plane, Total Immersion Racing, and Final Cut Express. Should I install one of those first or do something else? Thank you all for having great posts for me to read in anticipation for the last few months!