Instructions
Assembling a Yu-Gi-Oh Deck
Assemble your deck with at least 40 cards. You shouldn't have much more than 40, as you will be less likely to draw your best cards.
Make sure your deck is about half monster cards and half magic/trap cards. You don't want to be without any monster cards in your hand to play, or you'll have nothing to defend your life points within the game.
Include monsters with special effects. You'll want monsters that can be upgraded in level, gain bonuses with other cards or can harm your opponent's cards even when destroyed.
Have a fair amount of cards that will destroy your opponent's spells and traps. This will disable their strategy and force them into a one on one showdown.
Avoid stocking a lot of very strong monsters. Since you have to tribute other monsters to summon them, you can run out of monsters quickly.
Know that you cannot have more than three of the same card in your deck. You should also know what cards are forbidden or restricted in official tournaments.
Playing the Yu-Gi-Oh Game
Let your opponent take the first turn. If he gives away the first move, you can plan your strategy better.
Play your first monster face down if you go first. Make your opponent wonder what it is and what will happen when it is attacked.
Have a magic or trap card face down at all times. This will make your opponent wonder what tricks you have.
Start the game with at least two different strategies involving different monsters and spells. Try to use the first game plan early for a quick win, but have the backup ready if your opponent defeats the first plan.
Get your opponent into a spot where he has no monsters on the field. You can then attack the life points directly.