Appreciation of "value" in a bet is core to long term success. To profit over a long Stable Guys Reviewseries of bets you must be betting at odds greater than the true chance of winning your selection have. To do this however over the long term, you need to concentrate on each race individually and seek the value bet in that race. There is value to be had in every race. The key to it is understanding where that value is. Many times a punter will screw up a losing betting slip and say "At least I had some value".
There is absolutely NO relationship between value and prices. A 33/1 chance may be diabolical value yet a very short priced favorite may be supreme value. It does not follow that the bigger the price you take the better "value" you have. The value is sometimes clear but more often well hidden and it takes a trained eye to see that. Everyone has this "Foresight" on occasions, it is a game about opinions after all and nobody is always right or wrong. Value can be the most expensive word in racing if you can't bet winner. The old cliche is that value is about betting a horse whose true chance is better than its price reflects.
That's only a small part of it. You also have to make sure that you bet in the right way and in the right races as that is the only way you can keep strike rates high and protect a betting bank. You should continually strive to increase value in your bets. Once you have a selection you feel is value do not just take the first acceptable price that comes along. Seek to improve it by shopping around the various bookmakers or try and top the best bookmakers price by looking to the betting exchanges. Marginal improvements on odds on each bet you make can have a dramatic effect on long term profits.