Lol, sorry about that...I've got finals this week and I've been somewhat stressed.
Welcome to the club. There should be several topics that pop up if you use the search, because as silva said, this is a common question. For starters, check near the stearing column entrance and the fuse pannel, those are two common places with most cars.
the only place to run it directly through the firewall is by drilling through the rubber grommet under the steering column where there is a hunk of wires going through. personally i didnt want to risk hitting the wires so i ran mine anlong the brake lines toward the rear and in through a hole(was there already) in the floor under the drivers feet.