For the September AGC.
I generally always start w/ the pics (unless I'm doing a challenge where I have to start w/ the end result like a monochromatic scheme or something).
Anyway, first I get the pics and see how many pics will be on the page(s) of the layout. After that I decide what colors/embellies I want to use on the page. Then I usually flip through a becky's sketch book or other scrapbook mag to get an idea for the page layout. i NEVER follow them exactly, but seeing the ideas helps me get my own idea.
Then, I just start putting it together. My initial vision of the layout generally changes as I get everything on the page.