shower pan and stuff

Well here I am deep into my bathroom remodel and I am approacing the one tin I am dreadin the most. The shower pan.
My shower will end up being a 3' X 7' masterpiece of tiling and plumbing. I hope.

My issue is this: I have done electical, plumbing, tile work, and pretty mush everythign else but I ave never done a shower pan.

I ave the concrete, the liner, the additive and a good idea of what needs to be done. I am just afraid I will mess it up.

The current plan is to tile teh shower floor, but if I screw up the pan I can see teh tile cracking and all kinds of bad things happening. I have seen some very impressive thingks done with river rock that would look sharp and adress this concern, but that seems liek a thing a guy could screw up.

My question: what are the common mistakes people make when doing their own shower pan and how can I avoid these same mistakes.

 http://www.schluter.com/4625.aspx

 http://www.schluter.com/4625.aspx

Huh?. A page with 2 short paragraphs about some tiling system they don't even describe?.I'm confused.

What is it that's confusing, you want me to explain in detail how to build and tile a shower pan?

So you don't know how to click on links?

I.e.

http://www.schluter.com/5288.aspx

http://www.schluter.com/media/brochures/ShowerHandbook-2009-Web.pdf

And this page
http://www.schluter.com/5288.aspx
Has a number of other links - some to videos even!

There are different ways of doing it as well as types of membrane. The Noble Co. Site shows 3 different methods.
1. Mud bed
2 thin set
3. PRE MADE READY FOR TILE BASE.
[www.noblecompany.com]