I defer to "The Gospel According to Doyle" (or as it's commonly known, "Super System"). Pages 437-439. Some excerpts:
"Let's say I turned a big hand on the Flop--a Set of Trips or even Two-Pair. I'm first to act and I'm in the pot with someone who raised before the Flop. He's supposed to have a strong hand. He's probably got a big Pair in the hole--bigger than anything that showed on the Flop.
"In this situation, there's a principle I always apply to Hold 'Em. I always make it a habit to lead into the raiser whenever I turn a big Hand.
"Most players will slow-play their hand in that spot...or hope to get in a check-raise. When they do that, they're playing it wrong..."
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"If you turned a Set in an unraised pot (and it was a raggedy Flop, without a Straight or Flush draw)...you'd have to play the hand quite differently. Depending on what Set you flopped, you might not even play it at all. You'll see what I mean in a minute. But, the concept you should understand is this:
"In No-Limit play, you must be very careful you don't lose all your chips in an unraised pot.
"The...people in the pot with you tried to turn the nuts for free. And one of them might have the nuts. Or close to it. So when one of the players commits all his money, when there's only a few hundred dollars in the pot...you better watch out.
"Nevertheless, when it's checked to you, you've got to bet it. But you don't want to get broke with the hand because it was a 'nothing' pot to begin with."