With this game, I have noticed that alot of mentors who try to help often word their advice in a condescending manner which makes the newcomer ask themselves if this person is making fun of them or not. In general I agree with what most have said in this thread, but for me the most important parts of being an mentor is:

1. Willingness to share skills, knowledge, and expertise.
2. Demonstrates a positive attitude and acts as a positive role model.
3. Provides guidance and constructive feedback.
4. Motivates others by setting a good example.