...When considering your approach to 3&4, remember that cancer and heart disease are either waiting in the wings or already sneaking up on you.
Also, you will soon have more use for a nose and ear hair trimmer than you can even begin to imagine.
I workout and try to eat right but I do indulge more than I should. However, my fiance is a nurse at a hospital and worked oncology for many years. Based on what she has seen and dealt with, she told me if she gets cancer not going to bother with chemo or any of that. Just go with it. I am probably going to follow her advice for I never got this whole oh I am too young to die. When it's my time then it's my time. Simple as that.
As for the nose hairs: way ahead of you. I have one in the bathroom, my car, and my office desk at work.