Saying the wrong thing at the wrong time is bad enough when you're among friends and family, but if you put your foot in your mouth in a professional situation, it could mean big trouble. You usually know exactly what to say, but for some reason, your words are getting all twisted and tangled as they come out of your mouth right now. Make it a rule not to open your mouth unless you know exactly what's going to come out of it. If you can manage to stick to this resolve, you'll save yourself a lot of backpedaling and apologizing.