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! Read How to Ask and How to Answer for a few tips to get started.
Use the review tasks as soon as you have enough reputation to – 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.
See anything odd? You can flag posts for moderator attention, for example questions that are off topic for the site, or answers that don't attempt to answer the question. This helps keeping the site clean.
Write some blog posts for the Super User Blog.
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 and get to know some of the other community members.
