It's interesting... when you try and try and try and try, literally... your best. And your best is not enough. What if you do that for years, investing your life and talents and gifts and resources and your very soul into a venture, a business, a church - only to find out that all that is in you is still insufficient to bring your organization to the desired place.
Number 1 - You need more.
If you find yourself in a place where you need more - GET MORE. Read! Pray! Study! Learn! Grow! Think! INVEST IN YOURSELF! Get more so you can give more!
Number 2 - Utilize others.
I know it sounds cliche, but we all need people. Find the home run hitters and utilize them in every way possible: delegate to everyone competent (even those who are not not yet competent, so they can learn), let others give the presentation, meet the executive team you are doing business with, dare I say pastors - preach the sermon.
When you come to the end of yourself, you come to need God for the next level. It's time to start seeking him afresh!