Yup. Coach posts a training blog for beginning and advanced class. I copy the blog into Word and annotate it outline-style with all of the details. I try to fill it in from memory and include the corrections coach makes. I think it's helped tremendously.
Yeah, after 4 hrs with Zog, I went out and bought a notebook. I realized i was so close but very far away from improving drastically. It's all in the details. Write them down.
Yes.. there's no way I can remember everything taught, all the mistakes I made, and what I did right for one night.. never mind a year or more of training.. I don't fill it out at the gym though I do it at home after..
I started doing it when I took Kempo and have continued into bjj. I keep my competitive record as well as new techniques. There are too many techniques to try and remember them all in your head.