I've been asked about my planner setup, so here goes. I found myself messing around with the calendar part of my planner too much and decided to replace a 1 inch Circa Junior size notebook with a 3/4 inch notebook and a "large" 5x8" Moleskine weekly + notes calendar.
I'm still using the Dayrunner binder I purchased off ebay for $15 early in 2007. The front pocket is handy for storing a flash drive and a fountain pen that I like but doesn't quite fit in the pen loop.
I switched out the Levenger discs with clear & blue Rollabind rings. The front pocket works great for business cards, papers folded in half, and Post-It Durable Tabs to divide major sections.
I still have the tabs set up in a way fairly similar to what David Allen recommends with a couple minor changes. Of course the big one is my calendar is a different notebook from the rest of my planner. This allowed the front section of my notebook to become notes instead of a calendar. I also don't have a regular tab for my address book. I have a pocket divider after the "Someday" tab and then I have my address book after that. One tab I did add: Goals. I have some things I want to do that are too big for me to consider projects but break down into different projects. One example would be "Be Healthy" which breaks down into get down to a healthy weight, exercise often enough, etc.
Here's the big change in my planning system. This is a standard large 5x8" Moleskine Weekly + Notes calendar. Calendar on the left for stuff that has to happen at a certain time. Stuff that needs to be done on the top right page, and a lined Super Sticky post-it with my Goals for the month on the bottom right.
I just use regular Rollabind refill pages for notes with a Levenger pagefinder to mark my current spot.
I keep two writing instruments in my pen loops. Unfortunately the pen loops are small so I had a very limited selection to work with. I ended up with a Hero pen from isellpens.com and a mechanical pencil - a Pentel P205.
I'm still using the Circa-magine notebook cover as my cover.
And finally, in the back of the binder I keep an extra index card or two for quick notes.