I wanted to add that I use 12x12 page protecters some, too, like here:
I think this is SO versatile, and I really love it. One week I only took 3 pictures and couldn't remember anything that happened except that one event, so I made a one sided page about that event, and it's one of my favorite pages in the album. You can just do whatever makes you happy, and you'll figure it out as you go.