A few useful ideas
From Asindu Drileba:
This video is about how to use a technique known as "dimensional analysis" that can be used to derive equations or attain further insights about a physical system.
From Big Al:
A nice, simple explanation of Markov chain.
(Sidebar history note:Alexandre-Théophile Vandermonde.)
More complex: Markov Decision Processes - Computerphile.