Here's a fun forum feature you might not have known about...
Type the @ sign, then start typing someone's username. You should see a popup menu of suggested forum members. Click on the person you want to be mentioned in the post, and a link to that member will be added to your post. (Similar to the way Facebook and Twitter works.)
If the person you mentioned has email notifications turned on, they will be notified that they have been mentioned in a post.
Useful if you want to address a specific forum member. Of course, the more inclusive we can make any conversation, the better. So keep in mind that addressing a single person could have the unintended side effect of making others refrain from providing a perfectly valid answer. In other words, use it, don't abuse it