Super Mom! And surviving paper clutter

I want to keep every paper Imogen ever colors or touches or looks at, but I don't guess I can. I am trying, but I may not be organized enough. I want to keep all her kindergarten work in one container-and first grade work in another, but I think there is already some crossover.

Once like 10 months ago I had left some of her work in the van and it mysteriously landed on the floor. She asked me (pointing at the paper) aren't you proud of my work? It broke my heart because as other parents toss 95 percent of everything-I try and keep 95 percent of everything, but while a sheet is in limbo from van floor to wall or storage container it triggers feelings of indifference which is not my plan at all. My living room is plastered in her artwork, but if that one forgotten worksheet is the reason she doesn't call as an adult.......

Earlier last week, Imogen's teacher had to email reminding me to send in a form-a form that was probably not thrown away but transferred from one area of the van to another so one might actually sit on a seat in the van. I am the mommy that remembers things. I am the mommy that tries to remember all things pertaining to my daughter and her school life. But, because of the enormous amount of paperwork that comes home, my desire to keep everything, and my lack of organization-I have lost my cape.

Please advise.