Ok. This made me laugh.

I was thinking are there smaller interventions that I could convince many people to take up. For instance, I want to look into 100 happy days, but depending on how effective it is, widespread proselytizing of similar tolls may be a cheap way to raise a lot of utility.

That said, I was thinking today, that If I were given long term direct contact with a willing student, I probably could teach him/her to live in Joy (I'm thinking of stoic philosophy and Buddhist non-attachment, plus all the behaviors I've discovered or invented to help me live intentionally). I've long thought that I should wight a book called Techniques for Intentional Living. Hmmm...I suppose I could open a personal advisory business. It would fit in well with the other work I do. However, I don't think one-on-one consultation is a good plan for high impact.

So, you could call yourself a "happiness advisor", read a few books about happiness, give people around you ideas how to improve their lives... and perhaps at the beginning just ask them for voluntary donations if they feel your ideas have improved their lives. Also ask them for some kind of written feedback, which you will use as an advertising later.

I should note that this isn't far off from what the CFAR is aiming at. Ultimately, rationality should convert to accomplishment of one's goals, and if one's goals are well chosen (which may or may not also fall under the umbrella of rationality?), accomplishment should convert to satisfaction.