my SIL taught me a nice trick, but I can only manage to get it to work on quarts and sometimes pints.
take the canning RING, and place it with the bottom against the jar, the thinner part (bottom of the ring) touching under the seal. sometimes, the seal is a bit off center, so it works better where it hangs over the jar a little more.
grab the jar with both hands, your thumbs over the Ring. Push up with the ring to pop the seal off the top of the jar.
I wish my camera was working for you, cuz I do not think I described this well.
as for the can opener method, I found a picture for you:http://junkdrawerblog.com/wp-content/uploads/2007/12/opener.jpg
it is even labeled.