For me, the easiest way was the slide hammer method. I bought one (although you can rent one) from napa. Get the three pronged puller, and yank till it feels like it's going to come off of the jack stands.
There is another method that some prefer. Get a VERY long section of steel tubing. Yank out the whole center section inside the housing, stick that long tube through one axle shaft housing, all the way into the other side against the bearing, and wack out that bearing. Some say this is the easiest way, thought I haven't tried it, and haven't had a problem with the puller.
A tip, those new seals have to go in straight, and getting the in without ****ing them up is near impossible. Use the old seal and place against the new one, then grab a short section of 2x4 wood, and tap the new one into place using the old seal on top of the new one. Any other method, and you'll bend the new seal going in. Good luck!