I know, this sounds weird, but I forgot how much fun it was to hammer nails until yesterday. A group of managers from my team did a full day volunteer project at Habitat for Humanity in Daly City. This was my first H4H experience and I found it to be physically and mentally rewarding, not to mention the good that will come of bringing homeownership to a low-income family in the expensive Bay Area housing market.
At any rate, just remember, the key to successful hammering is to make the hammer work for you and get leverage by holding it closer to the bottom!