Three items I try to focus on:
1. Respect & Avoiding Altercations
It is definitely good to realize that everybody is entitled to their opinion. Sometimes two people can be so adamant on their views that a debate escalates. At some point, somebody has to step back and say "I may be wrong, it's just my opinion". I treat each thread like it is a hockey game. Once you've played the game (made a few posts), you need to prepare to post your final thought, leave the thread, and not worry about future altercations with the same person on the same subject.
2. Post your thoughts... even when everything has been said.
Most threads are asking for opinion & help. There may be three posts saying "Go Player A" and one post saying "Go Player B". If you think it should be "Player A", post your reply or "QUOTE" somebody's comment and simply type "I agree with this". Quoting and agreeing with somebody's comment is a nice compliment. It also reinforces the strength of making a decision for the person seeking advice.
3. Using "search".
There is a tab at the top of the forum where you can do an "Advanced Search". I realize people are often short on time and have a specific case they want a nice clean thread where they can collect thoughts. That said, it might be a topic that has been addressed before and some of the wisest comments may have been said... and the poster may not show up to say them again. Before starting a "What are your thoughts on Player X?" thread, go and see if there is anything within the last 3 months. The boards can get cluttered quickly during draft time - the site is very popular - and it is helpful to keep everything as tidy as we can.
Mercy I love this site.