[GAL]

Blocking bets are something I have only just started to use as it's only recently I have begun to understand them.
This is when I use them and why. OOP with good made hand (maybe trips or made straight with 2 flush flop) if the flush card hits the river I bet between 1/2 to 3/4 pot, I do this because villans holding is either a made hand or he was drawing to a flush which just got there so he can't have nothing. If I go for a check call, (which is the play I always used to make), he will check behind me with his made hand and make a bet, which I will call, with his flush. Therefore I make nothing when i'm ahead and lose money when behind. So it's more of a value bet than blocking bet.
When I hold a weaker hand when the flush card hits, say AK for TPTK or top 2 on the flop which are no longer top 2 by the river I make a smaller river bet because the rank of hand that I can beat is now smaller and my bet is now a blocking bet rather than value bet. Both of these senarios are for when the flush card hits and I will fold to a push in both cases but probably call some sort of reraise with the trips/straight hands.
The other situation is where I have these hands and the flush card doesn't hit on the river. With the stronger hands I prefer to "sell" my hand for whatever I think Villan will call and if he wants to bluff fine. The only time I check here is when the villian is very LAG or on tilt, I don't know if it's because I've become more aggressive or because I'm running well at the moment but it seems people just don't bluff me anymore when they miss in this situation. When I have the weaker hands it gets a bit trickier and it really depends on my reads because if I check/call I need villan to have a 1 pair hand and if I'm going to call a $X from him I would prefer to bet $X myself and have some fold equity however small it may be.
My understanding and use of all this may be totally wrong because as I say it's something I've just started experimenting with, so any comment's or corrections would be appreciated.