How to antagonize your colleagues

• Be passive-aggressive even as you protest you're just trying to be reasonable.
• Protest that you're listening even as you ignore what others are saying.
• Complain woefully about all the work you're doing, implying that others aren't carrying their load.
• Play the martyr.
• Be self-aggrandizing.
• Talk so much and so often that you exhaust the ability of anyone else to have a cogent discussion.

(Yes, this is based on a real person.)