I'm looking for a way to store my documents for easy retrieval. I tend to categorize things in terms of the customer I'm dealing or by product lines (companies we buy from). So, I have a credenza lined with binders for customers and a file cabinet filled with the same. I'm looking for an alternative system for 3 reasons:

1) It doesn't seem efficient to store all this stuff in paper form (takes up too much space).
2) It can be hard to find things.
3) I spend at least 1/2 my time out of my office and I'd like to be able to retrieve things wherever I am.

I'm looking at software such as MS OneNote. I have a good scaner that puts everything in .pdf. So I should be able to electronically store things. But I'm not going to do that unless I have a way or organizing it.

Any opinions on that software or any other suggestions?

John