Be sure to get eye contact and hold your audience by statements that are sure to generate and hold interest. Sly About Prompts Use notes, but not obviously. A good progression of slides is the best set of notes. If you do use written notes, don't carry them around, leave them on a desk. If you carry notes, use cards held in one hand.
Preparation Is Everything There is no substitute for a good idea.
There's a lot of discussion in MASC about how interdisciplinary a seminar should be. Two disciplines are the minimum, of course. In Marine Science it's hard to avoid interdisciplinary crossovers. Choose your subject well - this is most of the battle. Discuss your subject with the faculty.