I haven't stepped (willingly) near a church in almost ten years. Or a mosque, or a synagogue, or a temple, or a fellowship hall. I'm not about to start now.
Things I would be willing to give up, though: meat (except fish), milk products, and junk food. I would give those up anyway, as I'm trying to optimize my health. Now would be a good time to do it, though.
I would not give up masturbation. If I'm not in a relationship and I'm not having regular sex ... I'm sorry, I'm touchin' it. Frequently and often. You wouldn't ask an out-of-work baker to stop cooking, would you?
I would also give up being sedentary. I'm already riding the recumbent stationary bike at least every other day. Make it every day. And at least a two-mile walk every day as well.