One of the best tips for business or life in general is that when you make a commitment, you keep it. If you don’t keep your commitments, it’s the quickest way to have people not trust or believe you.
My parents have had this saying for as long as I can remember. “Say what you mean and mean what you say.” If you say you will do something, then do it. If you think you won’t be able to do what you say, then you better not make the commitment in the first place.
Sometimes no matter how hard we try or even if our intentions were right, things can still happen where we can’t keep our commitments. If something unexpected happens, the best way to deal with the situation is to communicate right away. Never let the other person wonder what happened to you because chances are, especially if they don’t know you prior to that, they could think of you as a flake.
Stick to your commitments. People will know they can count on you. There’s no secret to this. It’s just common sense.