•Fulfill your duties without excuses. If you cannot do exactly as you stated, then have reasons -- but first, help with making other arrangements, make amends, apologize... if that's appropriate.
•Never neglect or shrug off your part, becoming lax or slack. You will regret it in the future as the people who thought they were your friends will look elsewhere for favours.
•Do not forget your commitments, say and mean it: "I will remember