Protect intellectual property.Never place proprietary information on-line
Respect copyrights and fair use. Always give people proper credit for their work and make you have permission to publish something.
Be responsible for what you write. Avoid language that could be considered defamatory, harassing or indecent. Before you hit send, ask, "Do I want my mom to see this?"
Bring value to the discussion. To build a following you need to bring something to the table so make your contribution significant and meaningful.
Be open, honest and authentic. Include your name, if appropriate the company and make statements in complete disclosure of any potential bias.