I had an awful day too. My first session of the day was at 100nl (as usual). I left one table with $480, another with $250 and the other with $160...yet I only managed to finish the session $230 up. The session started beyond brutal...I was lucky to pull it back!

So I go back in the evening for a mess about in a tournament. Make it to the mid stage, but as per usual i'm set next to the chip leader...who seemingly can call any hand and hit. AK vs A9...yeah, he hit trip 9's on the flop. Game over.

I played at two tables during this tournament and within an hour i'm $250 down. every 60/30 situation where i'm ahead, I lost.
KK vs AK, no good, AKs vs QQ, no good (10JQ flop, junk turn, J river - I believe i had around 90/10 odds on the turn).
I had a guy at the table buy in for $20 and leave with $200. I honestly do not think I won a pot at the table over $20. He'd crack my Aces or Kings by calling bottom pair or inside draws to the river and hit his straight/trips. I ended $300+ down. Seriously, if you have more than 2 people in the pot when you're holding AA or KK, and they are willing to call their bottom pair or inside/backdoor draw to the death, you will lose...every time!

But I decided to try the donk tactic a few nights ago. I got dealt 47o and reraised x14 preflop. Flopped 3TJ. I bet pot on the flop, turn comes 5. I bet pot. Turn comes 6...unreal...but it works