If I’m doing generally constructive things with my time and mental energy, it usually makes me want to do more constructive things. Whereas if I’m being a slug, it’s not exactly inspirational.
There’s a feedback loop of mental energy that comes from using it productively. A sort of recycling effect. Part of that is purposely engineered – if you deliberately live a more transparent life then you’ll tend to be more motivated to do good and more rewarded for doing so.
As much as you can, do that engineering. Create systems in your life that reward you for doing virtuous things. We are creatures of our habits, but our habits can be hacked. If the end result is good, it doesn’t matter that you had to coax yourself a little to get there.
The Opportunity Machine 