When you are driven towards success, you like to think you are indispensable. But if something happened to you today your company would find a way to go on without you. All of the hours spent to 'make it' could be washed away as though you had never contributed.
LIFE IS ABOUT MORE THAN JUST YOUR JOB AND THINGS. THESE CANNOT FULFILL YOU!
If your identity is wrapped up in what you do or what you have instead of who's you are, then you are missing the best that life has to offer. Start enjoying the best that life has to offer, relationships, community...and your job.