How do you know what to put in the tags?

When using tags just put in a couple of key words on what the discussion is about, (for example this could be - discussions, tags) they're there to make it easier to search discussions etc. You can skip tags and you only do it the first time you respond to a discussion (I think, can't remember exactly :-) )

I think of the tag as a title of your response or discussion.I usually leave the tag blank unless the discussion could be put into two different catagories, like a discussion about the Red Sox I started. I tagged it Red Sox and baseball.

It is good to put in what the main point of the discussion is about. So if the topic is about parents abusing their child,you could put in evil moms and dads, or cruel parents. It is okay to skip the tags if you do not know what to put on them. The best idea is to read the discussion and get a general feel. It is kind of like trying to get a Title for a story. You have to get the sense of the whole thing and it has nothing to do with popular. Oh and if a tag you usually used will do, use it. It will be easier.