Many of your opponents will treat you differently when you're winning than when you're losing. That's because they're conscious of luck and fear you more when you're “running lucky.” When this happens, everything is as it should be in the universe, and your opponents are easier to control. You can bet marginal poker hands for value that you wouldn't be able to otherwise — because you'd be afraid that these same opponents would be inspired by your losses and would raise aggressively or play deceptively.
It's true. When you're winning, your foes are apt to be docile and well behaved, and this allows you to press every hand for maximum value without fearing that they'll get maximum value for their hands, too. But, wait! What's the best way to adjust, depending on whether you're running good or bad? Simple. Most of your decisions in poker will be “borderline,” meaning that the decision isn't especially clear.
Do this: When you're conspicuously winning and faced with a borderline decision between checking and betting, bet… AND between calling and raising, raise.
But… when you're conspicuously losing and faced with a borderline decision between checking and betting, check… AND between calling and raising, call. These adjustments works like magic, and they're pure profit.