I use different organizers for different things....a different approach to add to the excellent suggestions elsewhere in this thread are these cases on Amazon that I like a lot:

https://www.amazon.com/gp/product/B071JTTSLW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

They are around the size of a business-sized envelope and simultaneously see-through because of the mesh but stiffer and sturdier than a plastic solution. I put things like makeup, first-aid type stuff including meds, my travel sleep mask and earplugs, charging cables, things like that in these.