Sklansky and Malmuth on Slow Playing

Again, well put:

Slowplaying basically means to play a hand weakly on one
round of betting in order to lure people in for later bets. Hands that are correct to slowplay don't come up very often. For a slowplay to be correct the following criteria must be met:

• Your hand must be very strong.
• You probably will chase everyone out by betting, but you have a good chance of winning a large pot if you check.
• The free card that you are giving has good possibilities of making second-best hands.
• This free card has little chance of making a better hand for
  someone or even of giving him a draw to a better hand with sufficient odds to justify a call.
• The pot must not yet be very large.