The key points regarding hobbies are the first ("administrative") and third ("impossible to complete") points. The hobbies that I've had which were successful h

The key points regarding hobbies are the first ("administrative") and third ("impossible to complete") points. The hobbies that I've had which were successful have all been ones where I was intentional about (and capable of) generating incremental, tangible progress within a single session. The hobbies I've failed at are those where I tried to work on a large goal without any rewarding subgoals, and eventually couldn't make my brain work for nothing anymore. For me, at least, it still applies.