1. Talk about facts
2. Tell stories
3. Ask technical questions
4. Fix mistakes
5. Ask for examples, not opinions
6. Start with a little context
7. Avoid flamebait triggers
8. Preempt common suggestions
9. Ignore people who challenge your viewpoint (my interpretation)
10. Don't pursue arguments
11. Pay attention to critical feedback
Number 9 is I think not as defensible as the rest. These are pretty much the rules I've adopted for posting on HN.