Cost reduction is relative. I don't go to the gym, I work out at home if possible, and supplement with music or audio streams that I find enjoyable. And I'll prefer social physical activity (swimming, badminton) to sedentary social activity.

I think it's important to make it easy to switch projects or life tracks. Some would say that it makes too easy to sit in a pool of confusion - but on the other hand it means when you're sticking with something, you want to stick it out.