on my case...
i got 3 140's blowing in the front, 1 side 120mm blowingcold air to my GPU, 2 rear 140mm's blowing hot air out, and 1 200mm on the top blowing out hot air.
but you get the idea...
cold air to be brought in the front at the bottom, hot air exhausted out the back at the top, air convection currents basicly.
try to get ur side to exhaust like AR said, or just take it and somehow but it inside the case to boost the air flow over your cpu and to force more air out the exhaust fan. I did this in my old case and it dropped my temps 6*C