Why should you join a forum?
Joining a forum and posting regularly increases your circle of
friends online.
Go to the right forum for the right group of people you are
looking. Put signature on your forum that looks like this.

Do an introduction of yourself.
Example:

Always be humble and patience with your
posting level. Slowly you will find yourself blend into the community.
Try adding people into your msn, Yahoo messenger etc.Here
you are, Finally a senior of a large community and loads of network.