Here is my setup. Van with a partition between the cab and the cargo area. No door on my partition so I don't have to worry about having to remove my setup to open the door.
Hanging from my partition is a file rack something like these (
http://www.americanvan.com/van-organizers/racks/). They are a little pricey so I made mine out of a plywood back and some hanging file folders from Staples. In this file rack I keep my log books, a few 3 ring binders, and a large manila envelope that I stick all my receipts in.
On my passenger seat I have something similar to these (
http://www.onestepahead.com/Travel/...ganizer.pro?fpi=107318&catCd=2I&prefixCode=2I), but I have mine hanging on the front of the seat. In this I keep office supplies ( extra pens, pencils, tape, stapler, post it notes, etc.), my camera, digital tape measure, any sensitive electrical equipment. I think Duluth Trading still has what they called the Cab Commander, which is similar.
On my console floor I have one of those small portable file boxes (
http://www.staples.com/Staples-Handy-File-Box-with-Organizer-Top-Black/product_757448). Keep job files, installation manuals, etc. in that. Built a plywood box with hinged lid to fill the rest of the space. Keep gloves, flashlight, junk in that. On top of the plywood box I have one of those small console organizers, that hold misc. stuff ( pens, pencils, phone, change).
I have a garbage bag hanging off the front of my plywood box, but am thinking of partitioning off the foot area on the passenger side since that seems where all the garbage goes anyways.
Now just need to find a place to stick a printer!!!
Hope this gives you some ideas.