As someone who has used it for this exact purpose, it's enough to use it occasionally to enable you to keep your sleep schedule in check. If I don't manage my sleep schedule well, I end up waking up later and later, and having to loop over. Modafinil perhaps once a month allowed me to reset without having to burn a couple days being useless.

Ah, this is clever. I'm glad it works for you.

Sounds like the OP could use some regular modafinil.

Funny you mention that, but there is evidence that giving racists beta blockers reduces their racism:

http://www.medicalnewstoday.com/articles/242769.php

I often wonder if similar treatment could improve empathy across the board.