I wouldn't call it "advice", but I've observed that there are some stabilizing factors. Body chemistry is important, but the most effective measure (exercise)

I wouldn't call it "advice", but I've observed that there are some stabilizing factors. Body chemistry is important, but the most effective measure (exercise) is also affected by cycles: sometimes I exercise for months, sometimes I don't move a finger for months. It's easier to take care of what I eat/drink/smoke, at least for me. The other thing that works is routine. But not trying to control every thing I do or I don't. Working on something or writing, learning English, playing the guitar regularly, even half an hour a day results in progress. Progress makes confidence. And solid confidence is the best thing to lean on. Hope it helps.