I'll second what Mark said about exercise. I was one of those that exercised even when drinking, and actually increased the regularity after I quit drinking. Not intentionally, but fortunately for me, the end of my pink cloud phase coincided with realizing gains from running and weights.
Maybe if exercise isn't your thing, you could try something else — an instrument, art, gardening, etc.? A sense of accomplishment in some other aspect of life is a great motivator.