Most of the time the people who bluff and end up wining know exactly how to carry themselves, the game is about trying to deceive and confuse your opponents so that they may think wrongly about your motives.
Bluffing is the key of winning in poker games. If you are a good and experienced bluffer you will definitely win the game. Make sure that your opponent is not good bluffer than you, otherwise he can give you tough time in the game and my win all your money. Always play with less experienced bluffer in poker games, so that You will always be in profit.
Are you sure that bluffing is the only key of winning in poker games? Bluffing is just a strategy, there is no guarantee that you'll always win by bluffing. Even a poker pro player may still lose when he/she use bluff, or even a pro players getting bluffed by a beginner. So I have to disagree that bluff is the key of winning in poker games.
Bluffing by itself is definitely not the key of winning. I've noticed that in a poker tournament with hundreds of participants, players who bluff too much almost never make to the In-The-Money tables. They may win a lot, compared to not aggressive players, in the very beginning, but they usually end up losing everything to one or two players with better hands. Yet, many, if not most of the players, think that bluff is a secret weapon of sorts which they can always use to their advantage. Yes, bluff is a powerful weapon, but it is so powerful that it can kill you if you don't know how to use it moderately.