I recently took a class on internal consulting. The information is good for leadership as well. Many thanks to Bob Huebner.
Here's what I learned:
1. You need to know your role. Are you the expert, a pair of hands, or a partner?
2. The critical skills you need are listening, questioning, and advising.
3. The communications triangle is an equilateral one. All three sides are valued the same. You need to ask questions, check in frequently, and share information. Keep the balance.
4. If you want detailed information, ask open-ended questions (e.g. how and why).
5. Three quarters of the people you work with have a different style than you. You need to remember that not everyone thinks and communications just like you do.
6. You also need problem-solving, decision-making, and conflict resolution skills.
7. In conflict resolution, you need to address issues immediately. Don't wait until they fester and build resentment and anxiety.
8. Build strong relationships.
9. Communicate throughout your project.
10. The instructor also suggested "brain writing" instead of "brainstorming" as an idea-generating technique. It helps introverts and extraverts work better together.