stop and go HU I improved
 

Villain is LAP. Donked an overcard turn with TPNK, and fastplayed a flopped nut flush.

Party Poker 2/4 Hold'em (10 handed) converter

Preflop: Hero is BB with J[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">4 folds</font>, MP2 calls, <font color="#666666">4 folds</font>, Hero checks.

Flop: (2.50 SB) T[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP2 raises</font>, Hero calls.

Turn: (3.25 BB) J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP2 raises</font>, Hero calls.

River: (7.25 BB) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP2 bets</font>, Hero folds.

Final Pot: 8.25 BB

Re: stop and go HU I improved
 

It's fine. When the J falls you should be worried though that he had an 8, which would lead me to check call a portion of the time.

Re: stop and go HU I improved
 

I don't really see the need to donk the turn. Since you have the [img]/images/graemlins/diamond.gif[/img] outs, most hands your opponent could have only have like 3-4 outs against you if you're ahead. Betting when a scary card comes may only encourage opponent to make a correct fold when you're ahead, and get you raised when you're behind. Those hands that are ahead of you but aren't straights are probably not folding unless villain has a history of doing so.

I think a combination of "way ahead/way behind" and "check-the-turn-with-outs" ideas leads me to prefer a turn check here.

Do note that you can see a showdown here for the same two BB it cost you to get to the river.