How to minimize standard deviation?

[RustyBrooks]

That's good advice, but consider this:
If I can make 2bb/100 in a 5/10 game, playing my normal style, or 1.5bb/100 in a 10/20 game playing a lower-ev style (assume I could also make 2bb/100 playing my normal style, but the SD makes my ROR too high) then I am better off playing 10/20 with lower EV (in bb/100)... $30/hour instead of $20/hour. In fact, as long as I can make 1bb/100 or better in 10/20, it's better for me to do that.