If your into harder radio friendly music check out some older nickelback, crossfade(gotta love cold), three days grace, alien ant farm, disturbed and other tony hawk pro skater esque band.
On the more "better" music side, a perfect circle and tool are always good, one of my favorite "alt rock" indieish bands us envy on the coast(Lucy grey and low country are solid albums), a bad called bad rabbits, is a baller new "new crack swing" group outa Boston. Rx bandits for expierimental and the recieving end of sirens for just a good ride/listen album(specifically the album broadcasting a prison break with casey, the original singer)Glassjaw and head automatica if your into it, enter shikari and rise against for "let's go" rock music. For more on the heavier side but not quite deathy, it prevails, killswitch engage, select devil wears Prada.
That can start you off I guess. Alt Rick is a big genre