First I reread the entire notebook, I then flag pages that need transferring to the new book. Either it’s information I’m still working on or something I know I’ll be looking for on a regular basis. I have 3 pages that I transfer to the first 3 pages of every notebook- a list of my friend’s phone numbers and volume and weight conversion info. So then I start transferring the info as needed. AS I transfer the pages I remove the post it notes.
When I’m all done I put a label on the spine of the old book- labeling what category it goes into- planner, ideas or what not. I also put a date range on the spine. The book then gets tossed into my bag for another week or two just incase I missed something in the transfer. After that it goes into my slipcase for easy reference.