two blind plays

I was in the big blind in a 10/20 game with JTo, and got a free flop after 6 players including the small blind limped in.
The flop was 9,8,6, rainbow.
I bet, and everyone called.
The turn paired the 6; I checked, under-the-gun bet, and we all called.
The river was a jack, a potentially scary card.
I checked, the turn bettor fired, one player called, and I had a tough decision.
I didn't feel the bettor had a 6, and figured the other player would have raised with trips or a straight. I made a crying call (there was 70 in the pot pre-flop, another 70 went in on the flop, 60 on the turn, and two more bets on the river, making the pot $240, with no chance of a raise behind me).
My jacks up took down the pot, as the bettor showed pocket 7s and the caller had Ace, 9.

The next hand, a middle position player raised a limper and two players cold called before it got to me. I looked down at K9, suited in spades. I was instantly reminded of TJ Cloutier's words ("I don't play K9 even in a limit game!"), but chose to disregard them. I called the extra $15, the big blind called, as did the limper.

The flop came J, T, 8, with one spade. I liked my hand OK, but decided to check. It was checked to the pre-flop aggressor, who fired. We all called.
The turn was the 7 of spades, making my straight and giving me a back-door flush draw. I checked, curious about where I was in this hand. It was checked around to a late-position player, who bet. Not wanting to blow out the field behind me (and, not in love with my "1 card straight" since it was far from the nuts), I called. As hoped, I got 3 over-calls behind me.
The river paired the Ten; the action again checked around to the turn bettor who fired, and I called. The pre-flop raiser also called.
They both groaned when I turned over my hand and revealed the straight, and I stacked the chips.

The positional disadvantage of playing from the blinds can be tough to overcome, though it does add some variance to your game, since you'll play some random holdings for big wins. The more I play, the more inclined I am to not defend my blinds or to complete the small blind with random holdings. It's just too costly. K9s might be as weak as I can call a raise with from the small blind. And that might be too loose, but it felt good to stack those chips.