While sometimes it may look tempting to draw to a straight or just try your luck with 5 entirely new cards, the answer is almost always to keep the low pair. The general exception to this rule is when you have 4 cards to a flush, straight flush, or a royal straight flush. In these cases you always want to draw to the flush or straight flush because your odds of getting at least the flush are very good and the payout is so much higher. If you can remember this one single strategy, you will be in better shape than many players.

Often when you hold four cards and throw away one, the new card is the same value as the one you threw away.  For example, let's say you have 9, 9, 2, 2, 5, you throw away the five, and then you get another five.  This might seem to happen way more often than it should.  But that's an illusion caused by the human tendency to look for patterns.  A good example of how easily our perception can be fooled is to take the awareness test, where you watch a short video and count the number of passes the white team makes.  Most people fail.  I did.
Think about how normal video poker play goes. After depositing your initial amount, you start playing hand after hand. Most often you lose your bet. The next most frequent occurrence is to simply get your bet returned by hitting a high pair (or sometimes two pairs) that returns 1 for 1. You will also hit other higher paying but less frequent hands. In each case, however, unless you hit a royal flush or other very high paying hand such as four aces with a kicker, the amount you win is not enough to cash out and be considered a good win for the day. Instead, all of these lesser wins are really just extra money that allows you to play a few more hands in order to try to win the jackpot sized hand(s).
The don'ts are mainly related to making sure you do not end up losing more than you can afford when playing. If you have lost your daily budget it is important to call it quits for the day. Chasing your losses is a bad idea as it can lead to even more losses. You should also avoid drinking too many alcoholic beverages as this can lead to making strategy mistakes and bad decisions.
As you have learned in the first chapter, one of the main reasons for the popularity of video poker is it usually has a considerably higher payback than slot machines. In fact some games return more than 100 percent for a skilled player. Regardless of which video poker game you play, achieving the long term return percentage is dependent on getting your fair share of royal flushes. By a royal flush I mean the royal flush that really counts – the natural royal flush that is formed without the aid of a wild card. These generally pay 4,000 credits for a five-credit bet or 800 for 1.

Online gambling is largely unregulated in the U.S.  That means the casinos serving U.S. players generally don't answer to anyone.  If you have a problem with a casino (like they won't pay you), then you're usually out of luck.  I can't count how many players have written to ask me for help because they didn't get paid by some other casino.  (Not that I helped them—if a dodgy casino won't pay you then you're on your own.)
By now you have all the knowledge you need in order to begin your successful journey playing video poker. You know about how the pay table gives you important information about the characteristics of each game. You understand the importance of having an adequate bankroll and how to determine the proper size of that bankroll. You understand what a strategy chart is and how the video poker strategy is developed in order to allow you, the video poker player, to extract everything that you can from the casinos. You know how to use a strategy chart in order to obtain those results.
Because video poker is basically the integration of poker and slot machines, its history can be traced back to the invention of the slot machines itself. Charles Fey is the father of the slot machine. His slot machines had numbers on it and not poker hands. These coin-operated machines were developed in the U.S. in the 1800s and were very popular in saloons and cigar stores, especially in San Francisco.
One advantage that video poker has over regular slot machines is that you can determine the return of the game by reading the pay table on the front of the machine. Most video poker games use the combinations of hands that can be made from a standard 52 card deck. I say most because there are some Joker Poker Games that use one or two Jokers added to the 52 card deck. One popular variation of the game is Deuces Wild which uses a 52 card deck but the deuces are wild cards. With a set number of combinations that can be made from the cards used in the game, the payout can be calculated by how much the machine pays for each winning combination.
The popularity of these machines increased until they were an absolute must in any land-based casino. Now, almost every single casino on the Vegas Strip offers its players a number of video slot machines. In the 1990s, with the huge breakthrough in technology, video poker games started to offer better gaming quality and more variations of the game were introduced.
Video poker caught on because it appeared to be easier and less intimidating to play than table games. Video poker games are like slot machines except the players have a say in the outcome. The rules for play were simple; place a bet, deal a hand, select the cards to hold, draw replacements, and see the results. These playing rules are much simpler than all of the myriad bets that are available while playing live casino craps for example. In live casino or online video poker play there is no such thing as a pass line or come bet, a don’t pass or don’t come bet, place bets, lay bets, field bets, “yo-eleven” bets, whirl bets, big red, hard way bets, hop bets and the list goes on. 

You'll sometimes find video poker games online that aren't really video poker games, too. One notorious example was from Slotland Casino. They no longer off it, but they used to have multiple video poker games and even a blackjack game which tied into their linked progressive jackpot. Since the game was just a slot machine game that looked like a video poker game, it was deceptive.
The wild card is a feature that is offered at some, but not all, of the video poker variants. The wild card is always the Joker or the Deuce. This wild card can be substituted for any other card from the deck in order to help players achieve a winning poker hand. In Deuces Wild, for example, the wild card is the 2, which is where name of the game comes from. Another game is Joker Wild, where the Joker is the wild card. Some games might have more than one wild card, such as Joker and Deuces Wild. In this game, the 2 and the Joker are wild cards.
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