Obviously, strong presentation abilities are crucial. If you are interested in being successful within any sphere relating to commerce you must be able to captivate your audience. From my perspective, presentations are just another sales technique. Not that I am a supreme god of sales, but I have worked in a few "boiler rooms" and I have seen all the tricks. Regardless of what some stupid book on presentation skills and or effective sales techniques tell you, the meat of wowing people is in your enthusiasm, attitude, and knowledge of the information your are pitching. "Sell the sizzle, not the steak."