Do not be tempted to exaggerate or bluff your way through something today if you do not know the facts.
If you do not know something today, or you are not sure of the facts, do not try to bluff your way through or it will come back to bite you later. This is especially important if you are trying to win anyone over to your side or change anyones mind about something. If you exaggerate or make it up as you go along, this person will find out and your position in the argument will be flattened.