First, I would say take a break and get a little perspective. What is the cause of your stress? Is it the work? Is it the lack of traction for your product or

First, I would say take a break and get a little perspective. What is the cause of your stress? Is it the work? Is it the lack of traction for your product or company? Is it cash flow? Is it physical exhaustion? Assess the source of that stress and start figuring out why it stresses you out. Then do something about fixing the "being stressed out" part by changing your perspective on the problem. Second, realize that number of hours work is not necessarily the best approach. Figure out if you are spending the time efficiently. Figure out what could be done by someone else. Compute the cost of doing some of those other tasks and if the task is non-essential to your business and the cost of the task is higher than what you would pay yourself on an hourly basis, then outsource the sucker. Third, remember that YOU ARE NOT THE PRODUCT. The product is the product and it may need fixing but it's not you, as a person. Get that perspective and start looking at it as something that you put in customer hands, not something that you are. This should greatly alleviate the stress. Now go on to 40 (and beyond) with those concepts in mind. It took me until a second stay in the hospital at age 39 to realize that I was doing it wrong. I had burned myself out a few times (12 hours? pfft... try 18!) and after a near-death experience, realized that I could do a better job by refocusing. My new company, as a result, is moving along nicely and I believe it will succeed but I also realize there will be bumps in the road along the way and those are part of the natural course of things when growing a business.