Only with experience you will develope an instinct to pick up on bluffs.You have to watch the players habits and bet sizes.Do they check call draws or bet out draws.Do they always raise from the button.Do they slow play a flopped set.How often do they raise preflop.Studying these and other factors will help you put opponent on a range of hand.The range is not exact.For instance if a tight player raised preflop, and then called my reraise I would put him on a range of pocketpairs 10′s, J’s ,Q’s, AK ,AQ ,BUT NOT KK or AA. If he had AA KK I would expect a rereraise.
The flop,turn ,river give you more information.Analyse betting patterns, remember previous actions.Based on this if you get an unusual overbet.You got to think is he bluffing or has he trapped me.
Ofcourse you will not always be right,but as long as you are right most of the time,you will be profitable.
check my blog for my experience #

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