I'm glad you're asking, thanks for getting involved! Here are a few things you can do to get more involved:

 - Keep asking and answering - without questions and answers, we wouldn't be here!

 - Use the review tasks - there's usually at least a few items in the queue

 - Help with updating some tag wikis. Each tag has its own tag wiki, explaining how the tag is used and some information about the subject relevant to the tag. You can suggest edits on tag wikis.

 - Editing is another way you can help, but make sure you do it carefully. Making substantial, helpful edits is a great way to contribute to the community, but making tons of trivial edits is not.

 - Write some blog posts for the [Super User Blog][1].

 - If you're feeling bored, and have already done everything above (or want a break but don't want to leave), [come visit us in chat][2] and get to know some of the other community members.


  [1]: http://blog.superuser.com/
  [2]: http://chat.stackexchange.com/rooms/118/root-access