Just had a really depressing session last night. Unlucky a few times, lucky a few other times and then some totally wrong-headed awful decisions completely outlawed by SSS.
Went through my session with Hand Grabber this morning and discovered that: the total amount of money I lost from bad decisions was equal (almost to the $) to the amount I was down at the end of the session.
That is, my good luck and my bad luck almost exactly evened each other out, whereas my weak play (e.g. playing T,T in early pos. or bidding for the pot in freeplays with mediocre hands) accounted for my entire loss over the session.
There's a lesson there, I think. But will I learn it...