If your habit is to clear your throat, apologize a few times, minimize the quality of the work you’re about to share and in general, apologize for the assertions you’re about to make…
you probably realize that this is not an effective way to give a talk, lead a class or have a strategic discussion.
Consider carrying a coin in your pocket, one that’s large, or in a foreign currency.
Every time you feel like you need to minimize your contribution, simply stop and turn the coin over. You can count that as your obligation fulfilled.
And then you can get back to work.
[This isn’t simply an analogy. It actually works.]