Just use it on your processor, by applying it to your processor and heatsink, you are already using too much.
That method seems to work the best with everyone I know.
What I do, is apply a tid amount on the pcu, then I plas seran wrap on my finger, press my finger on the paste on the pcu and speard it out evenly, is seems that the heat given off my finger seems to make my paste more flexible in spreading.