Climbing the ladder
Gratitude is not a political category. Despite don't turn your back on your mentor or helper as soon as reached the position you wanted. don’t make him/her disgruntled for you may need assistance another time. Be extra cautious when becoming a boss to your former peers. Act like you still belong but set some boundaries. Let them adapt make slowly. Do earn, not claim, respect. Learn humbly what you have yet to learn. Remember, that the road does not always goes uphill. Prepare for your career (and cognitive) decline.