The Hump Effect is related to the idea that Wednesdays are considered days of hard work and making it through to the middle of the work week is just as getting "over the hump."
The Hump Effect, mentioned in Edward de Bono's book "The Happiness Purpose", is explained as getting people to do things which seem to go against their best interests at the moment. It may be a matter of preventing someone from doing something which is tempting, or making someone do something which is unpleasant, but eventually, this less attractive 'road" opens out into a wider one, with more, beneficial opportunities. A simple example would be the one about going to the gym. It may seem hard and/or boring, but if you succeed in constantly going, it will better your health and looks, which may prove exactly what you wanted for yourself in the beginning.