The game of concentration could help you increase your short term memory. It is an old, tried and tested method that could help you increase your short term memory. You could play this game with a pack of cards placed face down. Take 10 cards in pairs of two. Place them randomly and every time you pick up two cards, they must be of the same number. Like this, you would gradually pick up all the cards of the same number. This is one of the best exercises for your short term memory. Try it out and see the difference.