Many folk can make good money by playing online blackjack at an online casino but the house always has a slight advantage which the blackjack player needs to overcome. It is clear that the blackjack player stands as much chance as the dealer of achieving any hand but the house edge in online casino blackjack comes from the fact that if the player busts the house wins regardless of what happens or might have happened after that. The plan therefore to winning at online casino blackjack is to avoid busting before the dealer where ever possible even if that means standing at less than 17. The best clue that a blackjack player has is the one dealer card that is showing and although there are no guarantees it is generally accepted that a dealer 5 or 6 are weak cards and are more likely to lead to the dealer busting than other cards. Another thing to consider is when to double up but remember that when doubling up at online casinos the player will only receive one card. Doubling up on 11 is most common but it is also worth considering when the dealer has a 5 or a 6 and the player has less than 12. This in effect means that the player might end up with less than 17 but there is still an excellent chance that the dealer will bust anyway thus providing a win. Following the classic online casino blackjack play of the dealer which is drawing to 17 will not result in the player winning so the player has to use the tactics of doubling up and standing at less than 17 where the dealer card is weak. There are no guarantees in the world of online casinos or in the game of blackjack but tactical play can help.