need help (26tard)

So whenever I solve my coachings module or any other refrence book should I maintain a different notebook dedicated to that book or no These are 3 things we can do 1) maintain a dedicated notebook solving every question there (will be lengthy ik) 2)maintain a notebook for selected questions(pls tell me which questions to put in notebooks as well if this)and revise them along with class illustrations 3)don't maintain a notebook just depend on class illustrations and sheer concepts. Help will be appreciated