My idea binders aren't anything elaborate at all. I have one binder for full articles (divided by subject) and a second binder for layout ideas, categorized by number of photos used.
I'm much more likely to actually find an idea I'm looking for in a binder, rather than search through pages of a multiple magazines. Plus, magazines take up a lot of space -- space that I do not have! Whenever I feel like doing something scrapbooking-related (but not actually scrapbooking!) working on my idea binders is a nice, productive activity.