A self-improvement inquiry. I've got an irrational tendency to be too relaxed around other people; too sincere, transparent, and trusting. In general I'm very uninhibited and uncontrolled, and this goes to spectacular levels when I'm the slightest bit intoxicated. This has come back to bite me in more than one occasion.

I've had trouble finding documentation on how to improve on this. "Being too honest/sincere/open" doesn't seem like a common problem for people to have.