If it isn't blowing anything, heat or AC, then it is probably your resistor pack, which sucks.
Is the light coming on, but is the compressor not (you'll hear it in the engine bay click)? You could be out of freon, but you would have seen a gradual decrease in AC power, although I am not sure you would have noticed with this balmy winter we are having <cough> If you hear the compressor click, the engine RPMs change, but the air stay warm, you are out of freon and immediately turn off the AC, it needs freon to stay operating correctly. Most places can fill you up easily, but you may want to track down that leak.
You can check the fuses, they are under the dash in the passenger side. Prepare to channel your inner circus midget when looking at them...
If brute force doesn't work, you're not using enough.