For me gymnastics and piano. After so many years of crazy work and research (still crazy today, anyway), I could finally devote some time and resources to something that somehow was always dormant in the back of my mind. I even learned (with a lot of effort) how to backflip at age of 58, and all this gives a tremendous burst of energy, which is not easy to describe. Like a second life. Try it!
Have spent sizeable sum to learn from others, but they pretty much taught basics. Much I have developed came from self discovery and computer backtesting.
IIRC, you cut your discretionary trading teeth mainly on the ES (and the big contract of old), the most difficult, least volatile e-mini to trade. Scalping the NQ is far, far easier and anyone over 50 can certainly do it with enough practice.
%% Good question in this sense. Investors Business Daily rule == '' You snooze you lose'' Not that one late nap will ruin you; but too much lazy\couch potato will ruin your health + most likely shorten your life.................
Never feel satisfied with your wins in the market, always keep on setting new goals and targets for yourself. If you feel satisfied and comfortable once with your current situation, you will not be able to grow.