The mentors you choose should be people you respect, admire and want to be like. The advice you seek should be guidance regarding your character, personality, and specific ideas on how to do your job better. Remember, you can't figure it all out yourself. Don't be afraid to ask people for their help and advice. Ask for their guidance.
Character is by far the most important characteristic in selecting a mentor.
The second quality would, of course, be competence. This means the person is extremely good at what he or she does. A good mentor in your career is one who is ahead of you in your career path and has demonstrated that he or she is knowledgeable, has the skills, and the abilities to move ahead far more rapidly than their peers. Determine the things you have to do in order to achieve your goals. Identify the areas of knowledge, skill, and expertise you will have to acquire.