It appears that some people genetically need only 4 hours of sleep per night. Well, I am not one of them. I also don’t seem to be needing less sleep as I am getting older. Instead, I have come to appreciate how critically important sleep is for me. Looking back, many of my worst decisions, as well as my worst behavior, correlate with periods of insufficient sleep (or excessive jet lag for that matter). The particular effects of not sleeping enough for me areL I become short tempered and easil...