I spent my teens and 20s building business after business (and failed for the most part). I had no life. Now that I am older and do have a life (family), I succesfully run one business, and am working on building another. Less time to work on things means I have to produce higher quality. So the waste in process factor is reduced significantly. Before I would just amass a bunch of stuff to test. Now, I do quick/short tests and move on. No sense to waste anytime. After all, I only have so many heart beats left.