Well, something that Works-For-Me is my big BINDER of everything. I do have the day timer that I use for dates and scheduling. But this binder holds everything else. Let's just say that if there was a fire and my family was safe...I may come back after and try to grab my Big Binder.
You need the biggest binder possible...NO 1 inch or 2 inch...the mega one! After that you need to buy clear sleeves and dividers.
I have my first divider that states "Phone numbers"...then behind that I put all those school, church, cub scout, soccer team rosters and phone numbers in their individual clear sheet. My next divider is "Business cards" (I bought the clear sheets that hold business cards) and I have a ton of cards collected that I need and refer to often from hair, plumber to lawn service. Then it continues....I even have a divider that says "Restaurants"...I have clear sheets of restaurant menus and coupons. It's easy and quick and everything is in ONE PLACE and not here and there and over there in that BASKET!
Some other divider ideas is ....things around the town, doctor information for family, mailing (stamps, stickers), kid activities (put information collected from their sports, soccer, clubs).
Have fun with it...it's endless!