An old poker trick: A watch works well for this. You can assign probabilities to actions based on where the second hand is. So for example, Suppose you think

An old poker trick: A watch works well for this. You can assign probabilities to actions based on where the second hand is. So for example, Suppose you think it should be 80% action A, 10% action B, 10% action C. If, when you glance at your watch, the second hand lies between: 0 and 6 seconds --> Action C 6 and 12 seconds --> Action B 12-60 seconds --> Action A Another useful trick I use is to take the sequential digits of pi mod (n) for n possible actions. I happen to remember 40 digits or so of pi, so I can produce 40 very random-looking actions that way.