New Computer, give me ideas?

[Lust]

Ok, so yesterday was my birthday, and I got a new computer that is the total shit. I need help with things to do it on. The reason I can't do many things is, it won't have internet until Christmas, so here are some specs:
8 GB of RAM(upgraded to 16 GB on the 25th w00t)
500 GB HDD
Quad-Core
The processor I'm not to sure about, and the GFX card is okay, but I'm getting a new one too!

I have Photoshop on it, but I'm a newb to it, so what other things should I do? I've watched some HD TV and movies, but I'm just bored atm.