Keno, is a game of pure luck.

• The game of keno uses 80 balls numbered 1 thru 80. Every game, the house draws 20 balls at random and displays their numbers on screens (called keno boards) located throughout the casino. The object of the game is for you the player to guess some of the numbers the house will draw.
  You make your guesses by marking a keno ticket, a piece of paper with the numbers 1 thru 80 printed on it. Keno tickets are located at tables throughout the casino but are most readily found in the casino's keno lounge: a room or area with chairs to sit and write. Usually crayons are provided for marking the ticket.

  Before you go marking a ticket you need to decide how much money you want to gamble on the ticket.
  Near any stash of tickets you are likely to find several copies of the house's keno brochure, which tells you what the standard bets and payouts are this year.
  At any point in time all casinos tend to have similar betting/payoff scales, but sometimes there are various "house specials" available. For the sake of simplicity, let's assume for right now you avoid "specials".
  

Keno is a chance based game.
The best way to get the most out of your Keno experience is to properly manage your bankroll.
It's easy to get caught up in the excitement of the game and lose track, but be sure to not get over your head.
Remember to enjoy your play with Keno, as it's a form of entertainment with the chance of winning.

If there were a tried and true trick to beat the casino at Keno, they wouldn't still be offering the game.
What it comes down to is 100% chance, and there is no way to trick chance.
The best trick available is to utilize whatever makes you enjoy your keno game.

The easy way to play Keno!