Introduce your self
Make an automated signature - include a link
Post regularly

Create a folder with the group's name
Filter
Welcome new members
Look at the list of members - post it
Address posts - sometimes with the name of the group
Offer summaries of discussions to include new people

Welcome people
Address people by their preferred name
Reply, add, acknowledge, answer questions, offer information
Help others attain online group literacy.
Assume goodwill, aim at being generous and respectful
Be aware of the people who do not post much, include them.
Be aware of Netiquette
Thank people

Edit posts so as not to include too much quoting
Keep most posts short
Quote minimally from other posts.
Add a ">" before quoted text and insert a blank line before your response.
Distinguish conversation from data (appended data at end of post)
Observe group rules re HTML and attachments
Do not use all CAPITALS (often perceived as shouting)
Set line length to 70 characters or less
Edit quotes that have broken into long and short lines
Format tables or graphical layout in fixed pitch font in text based groups.

Save the welcome message and guidelines document.
Be conscious of the purpose as you post.
Initiate threads (conversations) that are on topic for the group.
Be the "owner - nurturer" of threads you start.
Keep the conversations on topic.
Use new headings as the topic branches into new conversations.
Offer summaries, ask enabling questions.

Learn how to search the archives.
Assist others in this skill.
Post annotated links to the group when appropriate
Quote and link to the archives.
Remove trailing material from posts (it clogs the search engine).