One concept that struck me when reading the Mathematics of Poker is the "Risk of Ruin" (RoR), more commonly known as going busto.
Bankroll Management is extremely important and if you only ever sit down with 5% of the Bankroll, you will be down to 1c/2c before going bust. If you've been serious about poker and can't beat that game then you need to rethink why you are playing poker.
That stated, the first lesson on Risk of Ruin is that any game with a negative EV has a 100% chance RoR in the long term. 100%. Gambling 101, every other casino game is -EV, so don't play them when waiting for a table to come free. Sports betting, Betfair etc aren't because you can have an edge, unlikely but possible.
More on Risk of Ruin next time ...
