Nothing makes you more determined to grow your business and treat it like a business when you start employing. Done it myself as well, nearly ran myself into the ground being pre-occupied with work and not getting the balance right with work, family and health.
Eleven years ago I had to quit my window cleaning business because of a serious illness which left me paralysed. Specialists in the hospitals told me I'd never work again!! Proved them all wrong...took me about three years to fully recover through help with consultants, doctors, nurses, physiotherapists, occupational thereapists and many others to get back to full time work again but I did it and decided from then on that I didn't want the hassle of running a business again, just want to appreciate my independence which I lost when I became paralysed, so I just do enough work to pay the bills and put aside for rainy days and emergencies.
Always took health for granted being extremely fit back then. Nowadays I just remember how demoralising it was being dependant on other people to look after me, feed me, dress me, shower me and all the other embarrassing things and how limited my life was and how grateful I am to all my friends, family and all the staff in the NHS who helped me mentally and physically to perservere and recover. Sometimes you need to remember there's more to life than just work, getting the balance right between work, family and health is the most important.