An article in Forbes cites the following:

"If I am to speak ten minutes, I need a week for preparation; if an hour, I am ready now." That maxim comes courtesy of Woodrow Wilson, the 28th president of the U.S.

I hope at some point in your life you will be pitching for money, for capital for either a new business initiative within your company or an investment or for a start-up company. The key is being concise and avoiding a "blah blah" presentation, meaning a lot of words without a lot of meaning or visualization. For how this is done, the article gives a lot of good examples of what not to do.