I may have blogged about my filing system. Essentially it's an alphabetical system with a drawer for church things, a drawer for home stuff and a drawer that still needs attention! It used to be six drawers, so getting it down to three was quite an achievement in the first place.
I'm planning that 2010 will see some more progress in my improving organisation, and that I'll start tracking things more effectively. The single most important thing for me is getting stuff written down and ordered into actionable tasks. I use Omnifocus, but a simple list is really all I need most of the time.
So, here's to a better organised 2010! Now all I have to do is set some achievable goals in all the other areas of my life!