If you're pitching your start-up to an investor there are two things you need: a great business plan and a great presentation. But while most entrepreneurs spend hours toiling on their business plan, the presentation often gets slapped together in the eleventh hour. All Powerpoints (or Slideshares) aren't created equal, though.

Check out these award-winning presentations, from Slideshare's World's Best Presentation Contest, via VC Guy Kawasaki's blog. While they weren't created to pitch a start-up, they each tell a compelling story that is impactful, memorable, and easy to understand—something all presentations should ideally accomplish. As you may notice, some of the key elements the winning presentations share is simple, minimal content, large writing, and eye-catching, exciting graphics and photos.

Check out the winners here.