Mail in the Pocket Sewers should stitch this solution. Create a fabric mail sorter and hang it in a convenient spot. The version shown here was tailored for out-going letters. Adapt it for incoming mail by including big slots for envelopes and small slots for a letter opener and a box cutter (for packages).
DIY password notebook - made from index cards and dividers. <- use for recipes instead
How to get started with Project Life, what you need, how to organize if you're ready to do your own thing. I've done PL for 2 years now. It's whatever you want it to be! It rocks! (I would start with the kits and then maybe branch out to doing your own stuff like in this article if you like it or have time.)