Several weeks ago, I was exhausted after my busiest week with 17 scheduled hours. This week my hours plunged to... 6 1/2 hours. That's a loss of more than half of my income, with four students going abroad and several cancellations, and the continuing unstable circumstances at the my second client. Next week will be quiet too, but the subsequent week should be back up to 17 hours or more. It is very much a case of feast and famine.
In the meantime, I've had a chance to dig into Ideas, the book my sister gave me for my birthday gift. It, along with anything from Jared Diamond and Steven Pinker, is a book that makes you feel truly knowledgeable after every page you read. It nicely lays out the development of ideas from time, to the Bible, to the early development of psychology etc.