There are literally hundreds of ways to force a card. If you are serious about learning good methods I suggest you pick up a book or a dvd on the subject. If you don't really care about learning forces, then you tube is probably the quickest way to learn any random card force. It is not the easiest thing to explain in text, so a video or pictures would be much better.
In my opinion, the classic force is without a doubt the best force to learn.
For future reference, I do not think that it is in the best interest of the Discourse to discuss actual methods of magic tricks. It is not a big deal when it comes to such things as simple card mechanics ( forces, Double Lift ect.... ) but I think it is quite disrespectful to the creators of original effects if methods are blatantly explained and I would suggest we not do it in these forums, it just tarnishes the quality of them.