What makes a good thread post to MetaFilter?
A good post to MetaFilter is something that meets the following criteria: most people haven't seen it before, there is something interesting about the content on the page, and it might warrant discussion from others.
As a first-time poster or new member of MetaFilter, take a look at the older posts to get a feel for what constitutes a good link. Look at the links that carry 10 or 20 comments to see what everyone is talking about. Is the link you're about to post provocative enough to show to everyone? If so post away.
A good thread values uniqueness over novelty.
What makes a bad post to MetaFilter?
Posting a link to your homepage and asking for feedback is a bad post. Self-promotion isn't what this site is about. Self promotion can be "earned." If you consistently post thought-provoking comments or links on the site, people will click on your name to know you better. On the profile page, you can put your own URL and people can check that out. There are numerous cool pages done by the members of this site, click on a few people to explore.
Self-linking also appropriates the use of MetaFilter as your guestbook. If you just wrote a thought provoking piece and want to get feedback on it, try Blogger or Typepad, which allows you to add comment functionality and community interaction to your own site. Don't link to friends' or family members' sites.
(note: it's ok to link to your own things as comments in threads, if it adds to the discussion and/or saves space because you're written a reply elsewhere)
Make sure you're linking to something on the web. If you're posting a generalized question to the audience, or posting a comment as a main thread, either find an appropriate mailing list, or use MetaTalk.
Posting a press release for your company's latest product launch or website makes for a bad post.
And lastly, don't troll (quick definition: posting purposely inflammatory things for the sole purpose of baiting others to argue the points until blue in the face - basically people do this for kicks, to destroy conversations and communities, for the hell of it).
Follow the golden rule, treat others' opinions with the same respect that you would like to be afforded.
Please keep comments focused on the topic at hand. Comments about the quality of a post are better left for MetaTalk. Comments should not be directed at other members of the site -- remember to stick to the subject and issues raised by the post, not the person who made it or others that commented on it. Comments posted with a minimum of content and a bunch of links to your websites will be considered spamming and result in removal and banning of your account.
Failure to follow these guidelines may result in your posts being deleted, your posting rights revoked, or your account banned. If your account gets banned, there will be absolutely no refunds given. If you have any questions, feel free to contact the admins.