Bluffing is a strategy in which you try to convince your opponents that you have a strong hand when, in fact, you may not have one at all. You can gain an advantagall rummy app.come in the game & fool your opponents into making bad decisions by using effective bluffing. Counting Cards: Acquiring Important Knowledge. Counting cards is an additional sophisticated rummy strategy. Maintaining an inventory of the cards that are still in play and those that have been played is part of the counting process.