My wife and I don't do it with diet, but with a couple of mind flexing games. No matter what else is happening, once a day, we stop to play a card game which requires us to work with numbers. In the first round, it is easy but by the 13th and final round it has become very difficult/complex. No electronic device engaged, only our minds.
The other game which we also play once every day is an old one, scrabble, which deals with words and also causes us to engage our minds.
hmm, i fancied myself as a cardmaster at one time, dealt poker etc; tryna think of a 13 round card game! which?
Love Scrabble, it's like the only game i have little chance at lol--ok that and monopoly, never won a game in my life--but anyway, there's a new tile game called Quirkle, i think i spelled that right, its a big hoot. We played the travel one, cant imagine the board one being any more fun though
as to diet, lol dont get me started, i cannot say enough bad things about the SAD ok; diet is a major front in the war to reduce population imo. You are a cell factory, basically, and your body wants Omega 3 and cholesterol to produce healthy, permeable cell walls. And omega 3 goes rancid very quickly, which is why it is absent from all of our shelf-stable "food."
That and vit D supplementing--to remedy your guaranteed, i know this for a fact, will bet you any amount you care to lose, rampant, chronic deficiency; for your locale--alone will manifest amazing improvements in even an 80 year old in about six months, with significant improvements in 30-60 days. Eschew fish oil, go for plant based. Quinoa and chia are pretty cheap ok. Dave's Killer Bread is pretty convenient. So imo there just is no excuse a