Yeah. I've actually never tried recreational narcotics, however have taken up the (now rather moderate) use of alcohol in the later years. I would rate drinks

Yeah. I've actually never tried recreational narcotics, however have taken up the (now rather moderate) use of alcohol in the later years. I would rate drinks + a good sleep as better for my work performance as higher than no drinks / poor sleep. So many factors. Having a baby certainly tested the sleep thing; I've been far more productive with a serious hangover than some of the nights where I've been up most of it looking after the baby. In fact, sleep deprivation was rather harsh on my cognitive abilities at that time. Some of my best memories come from stuff of extreme adrenaline, and they far surpass anything on alcohol. Such as riding a motorbike at Phillip Island, being able to make a pass on a guy with a far better bike than the one I had at the time. Or a really good mountain bike ride where I really nailed a particular section.