43/100 days of productivity: During 2 years I used to make notes and now I'm really happy to have done them. It's way easier to learn all I have to know. Also I like to write and rewrite to learn. I did it every time last year and do it again now and I think it is a good way to learn quickly since I have a visual memory and a memory to write (don't know how to explain). You know, the idea is to be quick and learn not writing well. So yes it is not aesthetic but useful and practical. But look at all those Bristols I have made !