Controlled Groups

Where I struggle most, moreso than getting on stage and talking to an audience, is in a controlled group, of 10-20 people, where I need to introduce myself, talk about myself, and explain particular ideas relevant to the discussion the group is having. I am getting ready to start the interviewing process where I will be talking to multiple people in the room at any given time, including board of directors. While I don't fear that now, when presented with the situation I can already see from past experience getting nervous, fumbling my words, feeling hot flashes, and coming across without the confidence that I do have about myself. Suggestions?