Trust me, less paste is better. Too much will give you higher temps and can damage your CPU. I use the glob in the middle. Between the size of a BB and the size of a pea. There are a lot of methods, and everyone has their preference. None are wrong, just what works best for you. It's only wrong if you put too much on it. But, Artic Silver is a good brand which is very popular. It just has a long cure time. But, it works well. These are the instructions from Artic Silver
, if you don't have their cleaning kit (which is very good) High purity alcohol works very well, and use a lint free rag to clean the old stuff off. A coffee filter works very well.