buy some arctic silver and apply a even amount (dont add to much ) but be sure to cover all spots on the cpu you dont want any metal on metal contact!
You are mistaken.
You want a thin layer. The point of the thermal compound is to avoid metal-air-metal contact which is inevitable without it since metal is uneven (ie not flat) at a magnified level. You want to apply enough thermal compound to fill any of these holes on the entire CPU. Don't overdo it. In an ideal world, if metal could be machined so there were no spaces, metal on metal contact would be preferable