Never underestimate the usefulness of plain cardstock! In this layout from our guest scrapbooker Vicki, the simple style and layout showcases the photographs perfectly, making them the star of the show.
I would recommend keeping a good range of colours in your craft room if you can, and an extra stash of white.
White makes an excellent background when you have busy paper or photographs. Its also great as a backing sheet if you have a printed paper you want to use, but havent got enough to make a whole double page layout as a 'wallpapered' effect.