This the subject blog is a prime online resource for everything you need to know about it. There are tutorials that will guide you on the step by step process, and there are articles that provide enriched information for your use. It is amazing how many people have actually learned much from this site. Feel free to browse the site… there is a lot of information waiting!
Passivity… the Worst Plague in the History of Humans
Obviously, there is a lot more to know about the subject. This brief article is just a start, and the next step is to do some more research. In any case, the tips in the article set the stage for a more detailed treatment of the subject.