Understand how/why a person feels.
Most important skill.
Don't assume you know how a decision was made.
Keep in mind users and rest of the team.
Asking questions in a non judgemental way.
"Can you explain to me why you did things this was?"
Developers interact with computers on the edgecase.
You are wrong about a great many things.
The less you fear being wrong, the more confident you can be.
Nobody has maxed out thier technical level of expertese.
Understand what you do well, and what you don't
*Always be Learning
Liberally learn new tech, conservatively use them.
Any tech could be the right choice for the right situation.
Make it a safe place.
Choices in tech only search what you make.
Nothing should be absolute (pro or con)
X vs Y arguments isn't worth the time.
Loyalty to people, not brands/companies/tech
*Better Your Community
Make other's lives better.
Make the community around you better.