I have the Hyper 212+. Someone once recommended the "crop" method (that;s what I call it). In the grooves on the bottom of the heatsink, I put enough in the grooves (the middle ones) so it protrudes enough that it looks like crop lines.
It is true, whatever works best for you. I used the sandwich bag, credit card, and pea sized method. For myself, I like the crop method