I am very weary of people that describe/brand themselves as productive. There is something about getting a lot of things done that is appealing to all of us, but in the words of a classic “it does not matter how fast you drive if you’re going in the wrong direction”. Setting that aside, both during the week and during the weekend I optimize for physical and emotional health. Eat well, sleep, exercise, spend time with…
It seems that I've been the most productive when I've felt the greatest weight of responsibility--first child, first few mortgage payments, first employee--and I have been the least productive when I attempt to avoid responsibility. Productivity, at least as defined as "what I need to get done to feel satisfied that I have fulfilled my obligations in the least amount of time" for me requires motivation, and nothing is so motivating as honest responsibility.
Saturdays are often filled with work for me, now. I work towards my master's degree, and I work on and around the house, and I work and play with my children. I rarely work on the business.