Please help!!! My brand new wireless router is slow as hell.?

My roommate and I just moved into an apartment for school and he bought a brand new router (it's an N? I'm kind of computer illiterate so I have no idea what that means) Anyway I just want to know how can I speed up my connection? I read that if there are a lot of other routers and stuff that that means there will be too much interference. How can I get my speedy connection back?