The old knuckle trick. I still find it handy when “30 days has November…” leaves me with some uncertainty.

Remember days in a month

Draw a basic bike

The Generalised Peter Principle states that "Anything that works will be used in progressively more challenging situations until it fails.

The Generalised Peter Principle is a specific case of the Peter Principle, which is the same idea but applied to people 😱.

I observed the Generalised Peter Principle when packing a minivan in Cambodia.