cooling... help

My room has poor air control, it gets about 80F in my room before i turn my pc on. After i turn on my pc it slowly gets warmer. It gets to the pont that my cpu gets about 60C before i shut it down.. So.. i inderclocked it to 2100 mhz. a 700 mhz difference (2800 standard clock [never overclocked]) and its running at a cool 37C about 98F and holding (all of this is under a 50% processor load).

Any one have abd tips on cooling this heat monster P4? how well does liquid cooling work?

On a side note i have 1 intake fan and 1 output fan. The case has room for 1 more intake and 1 more outake. The cpu fan runs about 2000 rpm's.

Thanks in advance