Once finding a girl that I am already attracted to and interested in the only thing that will add to that is P411 for me. I like it for easy screening and I think Gina does a good job of weeding out problem providers that would be bad for me to see.
I use all available resources. I check out her ECCIE Showcase, posts and reviews; P411; her website; any other data like BackPage; and often tineye her pictures.
I don't hobby that often (a few times a year) and it's an 80 mile drive into Dallas for me, so I like to maximize the likelihood that the lady is going to be what I'm looking for.
I almost always make initial contact and set up the appointment through P411.
I rarely go to a provider's website. I usually stop at the ECCIE ads and Showcase.
And I second the vote on avoiding Flash. Blame Steve Jobs for that.