[Flip-Flop]

To the OP:

As long as you understand how important is to properly bet your hands and don`t fall for that "protecting your stack by giving a free turn to a draw" nonsense you`ll be fine.

So...if you agree that you must bet your hands the only question is how much to bet.
First ask yourself what do you try to achieve with the bet.

If you are nervous about putting big portion of your stack at risk when you are 65% favorite then betting the flop in a way that your opponent will make a small mistake if he calls ( just like Harrington advises ) makes sense no?
Because bet you MUST ( if you like money ).

On the other hand, maybe you are so nervous about draws that you just want your opponent to fold ( like you mentioned in your post ).
In that case putting your opponent all-in ( picking up some fold equity by putting him on a hard decision and forcing him to make a BIG mistake if he calls ) makes sense no?
Well...not really.
First, you can never be 100% sure that he is on a flush draw and even if you knew ( for the sake of the argument lets say he shows you his cards )there are still way too many players that would call a shove with a FD at any stage of the tournament.
So "forcing your opponent to make a big mistake or fold" is very read dependent and much more complicated that it seems and you are making a bigger risk by betting much more then it`s needed to make the mathematically correct bet/move when "protecting your stack" was the idea in the first place.

My advise is to just follow what Harrington teaches you because if he doesn`t know his shiat then I dont know who does. [img]/images/graemlins/spade.gif[/img]