Fan Help!

[SloGuy]

Okay, I have 2 fans on my case (maybe adding more soon) and I also have a hard drive cooler. I dont know which fan(s) to make intake, and which fan(s) to make exhaust, for best airflow. (There is the front-mount hard drive cooler, a fan in my window kit, and a fan in the back of the case.)
Im thinking about adding a 92mm fan on top for exhaust.
Please Help

 

[SloGuy]

Hey, thanks a lot. By the way, I do have a window fan, which brings air in. I'm pretty sure now that I'm going to buy a big fan for the top of the case. (thats if I can find one at a descent price at the computer show this weekend)