I have a notebook and One Note app on my phone + PC. I use notebook to write the "final" plan for the day, and for some additional ideas sometimes I use the back of the notebook and sticky notes (I have it on the cover inside the notebook). I also write some summaries at the each page (every day has it's own page) and some intention.
I use One Note to store all of my University stuff, files, schedules, informations, notes, also for work (I work as a software developer) - it's very easy to get the screen shoots and put it there in the right spot. I am a participant of few students associations so every idea of that I store in One Note as well - it's easy then to copy it to google drive and share the ideas, plans and so on.
At work I also use the back of the notebook to write down things such as algorithms or something I need to kind of deeply think of.
It's quite huge solution (especially at the beginning) and it's really hard to keep it clean. Actually I just started use it correctly - I'm using it for 2 years now.