When i'm overwhelmed by a sense of accomplishment I usually like to slow my mind up, and sort of savor the moment. I like doing nothing for a while, just sitting, probably outside, with my dog. Occasionally I would enhance the slowness of it by maiming my perception with a generous quantity of alcohol. Sometimes rolling a drum is in order. But usually it's just a sort of reward, a free time, devoid of any content or task.
But getting to this feeling usually involves about a week of hard work, riddled with mines and problems, which I've had the luck to get around in acrobatic percision. This does not happen often.
Actually, most of these pleasures I derive from my music, my photography, and so forth...
Nice post!