Any inconsistency between what you say and what you do will be spotted and will become a measure of who you are. Others will have a difficult time talking and listening to you if there are questions about your honesty. The words of liars fall on deaf ears. If you make a mistake or there are misunderstandings, make corrections and clarifications promptly. Character is built.
Respect is earned.
Speak and listen with a positive attitude. People talking to winners know that they are going to be heard with an open mind and won't be cut down or otherwise criticized. Losers make no bones about letting people know how stupid they are or how what they're saying makes no sense. Winners open the door for a win-win solution even to the most difficult problems while losers slam the door on all but their own positions and opinions. We can both win.