This is a guest post written by Zane the Experimenter. Zane is the author of Life by Experimentation. His blog uses science and self-testing to quantify improving the quality of life, including everything from how to sleep two hours less per night to how to actually save money while traveling.
It has happened to us all. You go out one day and you cannot even manage to get through a basic greeting at the supermarket. What to do? Break down and cry? Give up?
The truth is that humans (and most everything in nature, in fact) are cyclical. Our bodies operate on circadian rhythms, which means the fundamental chemical balance in our brains changes throughout the course of the day. In the field of psychiatry it is accepted that mentally ill patients will have good days and bad days. If you have ever had a family member with Alzheimers’ disease you know that the human brain does not always function the same from day to day or even moment to moment.
In neuroscience we have learned that the process of making a decision or recalling a bit of information is, in some ways, a matter of probability. Action potentials, the stuff that thoughts are made of, travel down neurons in the form of an electrical charge. Each neuron is connected to around seven thousand others. Sometimes it amazes me that we are able to have a complete thought at all!

When you get right down to it, it is quite unreasonable for us to expect ourselves to perform at our peak all the time. As interesting as the science may be, though, is of little consolation when you’re staring blankly at the supermarket attendant. So here’s what I do when I have a “bad speaking day:”
