In the right circumstances, however, the player sometimes will break up a flush, a straight, or a pair of jacks or better. If you do not have one of the "always keep" hands, use the following list. Possible predraw hands are listed in order. Find the highest listing that fits your predraw hand, and discard any cards that do not fit the hand. For example, if your hand includes jack of spades, jack of diamonds, 10 of diamonds, 9 of diamonds, and 8 of diamonds, you have four cards to an open straight flush in diamonds, and you also have a pair of jacks or better. The four-card open straight flush is higher on the list than the pair of jacks or better, so you would discard the jack of spades and draw to the four-card straight flush. You are giving up the certain 1-for-1 payoff for a pair of jacks, but you have a chance at a straight flush with either a queen or 7 of diamonds, could draw a flush with any other diamond, or still could finish with a pair of jacks by drawing the jack of either clubs or hearts.
The first situation is when you get a low pair and one high card in your hand. You will immediately think whether to keep the low pair and go for a three of a kind, keep the high card and discard the rest to get a high and a qualifying pair or to keep the three cards and try getting two pairs. Before making the decision, you will have to know your odds for each decision. The odds for getting the third card for a three of a kind are about 1 out of 6-8 times. The odds of getting the matching high card and form a pair is 1 out of 2-3. As for the odds of getting two pair is slightly bigger than getting three of a kind. Therefore, it is obvious that the best
The strategy below is the Wizard's simplified strategy for Jacks or Better.  You give up just a tiny part of the return (99.46% instead of 99.54%) and in exchange you get a strategy that's much, much easier to learn and remember than the perfect strategy.  The 0.08% penalty costs you only $0.60 per hour of play on average, assuming a quarter machine played at 600 hands per hour.
So it really pays to hunt out the good machines!  But it's actually pretty easy, because the readers of a website called VPFree2 scout out the best machines and post their locations on the site.  Using that site you can see that you can there are 9/6 Jacks or Better machines on the Strip at Cosmopolitan, New York New York, Riviera, Treasure Island, and others.  And in downtown and off-strip casinos, the good games are more common, and available at lower denominations.
Winning a slot machine jackpot is based solely on luck. You put your money in the machine, hit the spin button and hope that Lady Luck will invite you to dance. There are no decisions to make that will change the outcome of the spin. On the other hand, many table games require skill and the decisions you make can determine whether you win or lose. Most table games when played properly have a lower house edge than the slot machines. Knowledgeable Blackjack players know that learning basic strategy will reduce the house edge to less than one percent.