In the same way that you're driven in your business to keep innovating - Facebook is a wonderful example of constant innovation - think about doing that in philanthropy.
You don't realize what a strain it is on the nerves to write or think-of-writing all day long, and to sleep full of nervous dreams, and to wake up not knowing who one is: this all stems from anxiety about finishing the book, about time 'growing short', etc. , and the perpetual strain of invention.