Anywhere from two to four hours depending. Right now I'm focused on calculation, I just need 30 more pages of Dvoretsky's School of Chess Excellence 2: Tactical Play and then I'll move onto Emms' Survival Guide to Rook Endings.
I wake up pretty early to run.
Lately I've been thinking about ways someone can reach their full potential. One would need sleep 7+ hours, good nutrition, regular exercise, and lots of fluids. This would provide the energy, and the maximization of one's mind and body needed to start trying to get to one's full potential. Actually acheiving that potential, would of course primarily focus around training one's self as long and usefully as possible in one's own free time, and getting the most out of the time one is at school or work or both, aka nonfree time. What subject one trains in, the school one goes to, or the place one works doesn't matter, all that matters is how one can improve the most at whatever they want to do.
I've been testing this with myself this month and keeping a record of how many total hours I've put into improving myself. I am of course getting constant sleep, eating healthy, and getting regular exercise, so as to make the time I spend training as efficient as possible. So far I can tell I'm operating at a much higher level than other semesters in my classes, and the effect is spilling over into my work as well and benefiting me there.
So the question is, how much time do you typically spend in a month training to improve yourself in your free time? Do you get the sleep, nutrition, and exercise needed to maximize your time? If the answers are not much, and no, do you regret not acheiving what you are capable of?
Of course all of this applies to chess as well.