I have something similar that I affectionately refer to as "my brain". This is what mine "looks" like:
Before any tabs are my daily or weekly planning pages. Whichever I happen to be using ATM. I have to switch these up routinely when I start getting bored with them.
First tab is "Calendar". These aren't "here and now" calendars. These are for dates beyond my current planner pages. I have a page each with yearly calendars for 2010, 2011 and 2012. I have monthly calendars for each month of 2010 and 2011. I throw away the monthly page after I transfer the events to my planner page AND recurring events to the next year's monthly calendar page.
Then, I have a tab for "Faith". Bible reading schedules, articles I want to read, quotes that I want to look back at, etc.
Finance. Checking journal. Bank statements (I scan Jan-June and July-Dec statements when I've accumulated a set, store them on a memory card and shred the statements then, so I never have more than 5 months of statements in the binder at once.) I also have receipts in this section for warranted items that I may need in the future. I glance at them when I scan statements to see what can be discarded.
Home: Holiday planning pages. Cleaning pages will go here when/if I drop out of the HBChallenges.
H/S. H/S planning stuff and ideas get parked here periodically.
Meals. Meal planning forms. Grocery shopping list forms. Recipes that I want to try out before transferring to a card to put into my recipe binder.
Medical: Medical records. Lab results. Insurance information. Medication dosing charts (tylenol, motrin, etc.)
Reference: Address and phone numbers. Birthday list. Account/reward numbers.