Following up on last time's quote tip, here's another tip you definitely have to know when commenting. Closing your tags. Take it from the dame in the picture, if you don't close your tags, you don't know what will end up spilling out.
Don't know how to comment? Here's how:
1) Click on the "Register" link on the top right of the page. Fill out the form by choosing a username, password and email for your eventual comment account.
2) Choose a post, click on it, and scroll to the bottom.
3) Fill in the comment.
4) Refresh the page to see if your comment shows up. If it hasn't within a day or two, try again with a better comment.