When a possible draw completes

100NL at B2B.

This is a situation I often get myself in and I have big troubles with them. You get a nice hand on the flop, and are afraid of straights/flushes etc because your bets just gets called. When the scare card hits, what do you do? I know this depends, but like in this situation where reads are zero (just sat down), what is the general approach?

Sorry for the crappy HH.

MaggieD (EUR 75,35 in seat 1)
Mr_Big (EUR 69,93 in seat 2)
_Julle_ (EUR 45,10 in seat 3)
keckoo (EUR 33,15 in seat 4)
zampik (EUR 45,02 in seat 5)
tehsuk (EUR 106,30 in seat 6)

Dealer: MaggieD
Small Blind: Mr_Big (0,50)
Big Blind: _Julle_ (1,00)

tehsuk was dealt: :Jh: -:Th:

keckoo Call (1,00)
zampik Call (1,00)
tehsuk Call (1,00)
MaggieD Call (1,00)
Mr_Big Fold
_Julle_ Check

(Pot is 5.50)

Flop :Js: - :Jd: -

_Julle_ Check
keckoo Check
zampik Check
tehsuk Bet (4,00)
MaggieD Call (4,00)
_Julle_ Fold
keckoo Fold
zampik Fold

(Pot is 13.50)

Turn :Js: -:Jd: - -:Ah:

tehsuk Bet (9,00)
MaggieD Call (9,00)

River :Js: -:Jd: - - :Ah: -

tehsuk ?????

Should I even be afraid of a flush? How much do I bet? This hand confused me a little, I don't have a great jack kicker either.

Another typical example to illustrate my problem. The river here is really really scary.

100NL.

Players:
kimv (EUR 68,30 in seat 1)
nilleking (EUR 95,00 in seat 3)
Armando_86 (EUR 27,50 in seat 4)
tehsuk (EUR 136,80 in seat 5)
azinger89 (EUR 41,10 in seat 6)

Dealer: nilleking
Small Blind: Armando_86 (0,50)
Big Blind: tehsuk (1,00)

tehsuk was dealt: :Ah: -:Ac:

azinger89 Fold
kimv Fold
nilleking Call (1,00)
Armando_86 Call (0,50)
tehsuk Raise (4,00)
nilleking Call (4,00)
Armando_86 Fold

(Pot is 12)

Flop :Qd: - - :Tc:

tehsuk Bet (8,00)
nilleking Call (8,00)

(Pot is 28)

Turn :Qd: - -:Tc: -

tehsuk Bet (20,00)
nilleking Call (20,00)

(Pot is 68)

River :Qd: - -:Tc: - -:Qc:

tehsuk ?????

OOP again, I never know what to do here. But that was probably the worst card in the deck. Check/fold?

Hand1
Plenty of options not sure which is right. Out of position i either lead for 1/2 the pot and try to show down on the river by blocking or i check raise for info and hope opp doesnt have the flush and that i can push them off. That only works for me because i atatck my draws so much so that when they do hit putting me on them is fun for other players. In position here id check behind and play the river as it looks.
Hand2.
Plenty of hands beat you by the river. Id be tempted to shove the turn fr the amount of times AQ/KQ have called here. It could be a set too but thats unikely considering nothing on the flop or turn. You need to get some notes on whether players are passive chasers in thsi scenario's which will help. AT 100NL its the key note i have, do they passive chase or aggressive chase? Once i know i can basically play turns more appropriatly.

First hand I'd probably again bet $9 on the river and consider folding to a large raise. Second hand check-fold.

One possible way of dealing with scare cards is to just bet anyways. You make it more expensive for your opponent to bluff, and also present the possibility that you may've actually been semi-bluffing and now have the flush or straight. As a result most opponents will be reluctant to raise you without actually having what is it they'd be representing. Checking when first to act just seems too weak in most situations, and basically invites a bluff. If you're in position and suspect you might get check-raised, just check behind, then call the river bet or bet when checked to.

#1 CR is a really bad option because the worse hands fold and only better ones call and it is expensive.

Check-call is kinda standard but you lose value from middle pairs which have no reason to bet here and you will get raised by a flush and a boat.

Betting half the pot and folding to a re-raise seems the best option to me. a PP and middle PP will most likely call and you are pretty safe folding to a re-raise as not many villains bluff re-raise here.

if the flush card didnt come I think I would check here and try to snap a bluff here without a read.

In the first hand I led out for 9 again and was called by J9.

The second hand I checked and called a flush for 20. I got 4.4-1 on my money, am I good often enough here to call 20? I understand that my check here is often a sign of big weakness and can be exploited. But at the same time, what other hands that Qx or two clubs can he have here that I beat (after calling all the way). I'm leaning towards a fold here when I think about it.

I like your play in the first hand because its kind of a blocking bet and kind of a value bet. He can't fold his J9, but it lets you escape his flush if you need. You weren't beating a lot of hands on this river but I think you played it well.

Second hand is a pretty shitty situation since it looks like the worst possible card just hit. Check-calling like you did is a good option, but this board was so stupid I probably would have just folded to what looks like a value-bet. Just give him a % of bluffing and fold otherwise because theres no hands here that call down and then aren't helped by this river. Well there might be, but I can't see em without my magic 8ball. Except for KJo, but you won't see that often here.

In the first hand, I think a check-call or something similar is in order. He called your flop bet which means he is on a draw or has a hand, so he either has a jack or a diamond draw, as he can't be calling with much else that would make any sense.

In the second hand, I think it's a check fold situation. All you can beat is a stone cold bluff, and it's unlikely that he's bluffing. He either has top pair and hit trips or was on a club draw and hit, if you're lucky he has KJ or middle pair or something silly, but you aren't getting good enough odds to make this desperation call. In fact I would need irresistable odds to call a bet on the river when we're almost certainly beat.