So as I am new to hardware installation I have been watching a lot of youtube videos on how to install an aftermarket CPU cooler, more specifically the Cooler Master 212 EVO. One thing Ive noticed is in most tutorials ive watched, there is almost always a second fan added to the other side of the heatsink to create the "push and pull" method. Now I have a few questions concerning this. 1. Is this recommended and if so, what are the benefits of having it set up this way. 2. Do I just need a regular 120mm fan like this -- http://www.newegg.com/Product/Product.aspx?Item=N82E16835214029, or does it need to be a PWM? I am looking to use the push and pull method (although I dont know why and I wish I did, just going by what I see on youtube) so if anybody can recommended a solid fan for me to use for no more than 15$ and preferably LED (blue) that would be excellent. And 3. last but not least, how much thermal paste do I want to use when I do this? Do I want to put a chocolate chip sized drop in the center of the CPU and then apply heat sink, or do I want to almost spread the paste onto the CPU like pb and j on a piece of bread so to speak. And again, if so, how much paste am I using.