I have always used an extra snout/input shaft from an old transmission. Fill the hole where the input shaft goes with grease...as mush as you can get in there (you want as little air as possible). Insert input shaft in and then use large hammer to "press" it in. The hydrolics will push the bearing/bushing out. They also make special tools that have a hook on one end and a place on the other end to hit with a hammer. Will probably damage the bearing in the process, but if you are taking it out you are probably replacing it.
the cleanest trick is to use a starting tap and press it out. you can also pack the cavity behind with wheel bearing grease, and using a rod that just fits into the pilot hole, smack the rod with a hammer and the bearing should pop out, along with the grease.
This gets it out pretty quick, that's what I've always done.
Autozone rents both of them, 100 for the slide hammer, and I think 15-20 for the attachment, but you get all of your money back when you bring them back in.