When I’m about 1/3rd to 1/2 way through a sketchbook or journal I start to set up my next one. This gives me time to think about decorations and what journal type I want to use. Do I want blank or ruled pages? Dot grid? Hard or flexy covers? I grab a journal and start to make it mine. I add ribbons, elastic, a pocket and remove a few pages so I can collage. I number the pages.
Then I decorate the cover and set it aside to finish the one I’m currently using.
Lately I’ve been really into these sketchbooks from 5 Below. At $5 they have acceptable paper and are sturdy. They require all the prep I listed above.
These are some videos I have made of the process.