When I teach how to make a traveler’s notebook, students ask what products I like best and why. Here is a list of some of them. (Affiliate links; I receive a small commission at no extra cost to you.)
Paper for printing your inserts: Sooooo buttery! HP Premium 32. Mmmmmm….. https://amzn.to/2G6vSR3
Pens for writing in your inserts: My absolute fave is the Sakura Pigma Micron 02 because it doesn’t shadow and dries quickly, minimizing the time you can smear it with your hand. This pen is available in lots of colors (and smaller and larger nibs), but the black 02 is my go-to. The set that’s linked has 02, 03, and 05 so you can try out bolder ones, too, or bold certain words. https://amzn.to/2D3eM2A
I also love the Pilot G-2 07 because I can match my stickers and washi tape, but it does take a bit longer to dry than the Pigma Micron. The set of 20 works out to about a buck apiece. https://amzn.to/2UzWSLT
White line tape to fix mistakes: Tombow (see link) or I save margins of stickers and cut them to size. Or slap a “Nope!” sticker on top. https://amzn.to/2Trlczq
I will add more to this list later. Meanwhile, see my Pinterest board for more ideas: https://www.pinterest.com/jfilatoff/planner-ideas/