Practice. Naturally, you'll want to rehearse your presentation multiple times. While it can be difficult for those with packed schedules to spare time to practice, it's essential if you want to deliver a rousing presentation. I’m famous around the office for staying up late the night before a big presentation, practicing over and over. If you really want to sound great, write out your speech rather than taking chances winging it – if you get nervous about speaking, a script is your best friend.