Lennart Greens dvd's or Benjamin Earls Past Midnight are something you could take a look at, their both for intermediate to advanced skill levels and have great material.
Going with what Casey said, you could have a random card change into a selection and be like "Jesus changed water into wine, this is similar, but not as amazing"... Or something along those lines.
Jay Sankey and Oz Pearlman both have dvd's that explain different effects with the ID.
Oz Pearlman's
http://www.penguinmagic.com/product.php?ID=1729
Sankey's
http://www.sankeymagic.com/detail.aspx?ID=48151
~Andrew
Isn't it just hysterical how this thread went from critiquing Towtox's video to pointing out the flaws in Mehar's?
I also think kittens are cute.
~Andrew
You can also use "Smoother" which is a Bill Goodwin idea that can be found in Dan and Dave's Andthensome. All it is, is that you rub the edges of a new deck on your pant leg to smooth out the rough edges of the deck.
~Andrew
Expert Card Technique is another one with information on the faro shuffle. It has a whole chapter dedicated to the mathematical principals, stocks, and tricks with the faro shuffle.
~Andrew