On PlaysCheckers.com you can see a great variety of games, not only draughts. If you are tired of thinking how to win the computer, try Shuffle game — it is too easy to play.
The rules are not very difficult: there's a board with four horizontal rows on it on each side; you have 8 red balls, the opponent plays with white; try to beat all the rival's balls off; if you win in a round, you make a step one row forward; the winner is the player who reaches the last row quicker.
Choose the red ball, click on it with your mouse, hold the right button and drag it a little to choose the force and direction of the strike, release the button and shoot. Try not to lose all of the balls, otherwise in the next round you'll have less balls than your rival.