Some people have a great system for keeping track of everything. I'm more old school--mostly because I tell myself it's easier to write things down on paper than to learn a new system of doing things. It's not, really, because the backs of envelopes get lost much more easily than a computer file or an app. And our calendar gets plenty of use, as long as people remember both to write things on it and to look at it. But old school habits die hard.
My other filing system is located in my brain. It's highly portable, but subject to malfunction and is only accessible by me. I rely on it a lot, but I have a feeling I'm going to hit capacity once my kids get a little older and their lives get almost as crazy as mine.
I'd love your suggestions. Have you found an organization system that works well and that sticks? Because I have a feeling that this year, with my kids in three different schools and my freelance work picking up, I'm going to need it.