I print out a lot of patterns from on-line - if there's a magazine with only one pattern in which I am interested in I remove it, etc.
I have large 3-ring binders - with dividers - I put all of my patterns in plastic protector sleeves....
My binders have dividers - quilt patterns are divided according to style - Pieced, Applique, etc. - and then Blocks are divisied accordingly - as well as special dividers for projects - with tabs that would include Kitchen, Bags, Pin cushions, etc....
I find that this really helps and it's easy to flip though them and find ideas and just pull out the pages that I want to work on - and because of the plastic sleeves that all stay nice and clean and neat and when I'm finished I just put them back in the binder.