Paper, I am fairly on top of. I have my office space in the kitchen and it's easy to file, etc whenever because it's right there. The desk has enough drawers that each kid has one for their stuff. Some of it is school papers. When the drawer is nearly full, we go through it together. I am making the kids make the decisions on what to keep so that they're better than I am down the road.
Right now, all of this past year's school art work is in a bin waiting for me . I am going to organize it into 3-ring binders. I have the binders and the page protectors and just need to get it done. Something like this: http://reluctantentertainer.com/2010...ized-and-easy/
I started the whole organization project about 18 months ago and I love the Organizing Junkie blog. She has a lot of realistic tips and likes to shop at the Dollar Store, so many ideas are very doable. Last summer, I organized my kitchen cabinets and they still look good now! But it's because I made them work for us and not some other person.
You can do it! It just takes time.