I would leave school every day thinking that when I got home I could put in a few hours of work before going to bed. I never seemed to remember, while in school, that at home there would be other tasks that needed my attention. Some of them had an educational focus but were not school-related; my doctoral work alone occupies a huge space when I get home. And, of course, there's my family that needs me as much as I need them.
So, I decided to conduct an experiment. I would only bring home one or two items that I knew I needed for planning purposes, such as my calendar, my teacher journal (sometimes I'd be able to write before I left school), and a professional book and/or teacher guide.
I am happy to report that his experiment has been very successful! I don't miss all the papers and books I used to carry back and forth from school to home and back to school again. I can't even remember what I had in my teacher bag!
There is one notebook however that, from time to time, I wish I'd remembered to bring to school; I will add it to my bag starting next week. In this notebook I write down important ideas about teaching and learning that I want to remember. These turn up randomly and I've regretted not having this notebook handy to jot them down.
So, I highly recommend paring down the contents of your teacher bag, if you haven't already done so. It will lighten up your load, literally and figuratively.