for steps, just find some wide ones with out a lot of drop and play. As long as you don't panic grab, you'll be surprised at how easy it is.

http://trials-online.com/ this site Trials Online has lots of little movies about all the different unweighting technieques. Manual, wheelies, it's all here. There are tons of sites devoted to these things

I find you just have to keep trying and build on it. One thing we do that's fun is ride around some of the parks in play mode. That way the pressure is off and you can just mess around and try things. I"m still getting a lot of the front unweight moves, I feel happy if I can get my front wheel up on a 4" thing.

have you checked out the Sugoi Dirt camp in Hood River this summer? It's only $150, what a deal for a weekend of coaching.

http://www.dirtseries.com/lsds_schedule.html That would be much better for you than any of us trying to explain it.

Following riders better than you is always a good way to learn.

penny