I don't upload. It's not because I can't find images, but because tagging intimidates me. And so, after being coerced to do it, I made a userscript to implement a checklist to the upload page.
Project Repository
This userscript will add a checklist to the upload post page. It also adds a small quality of life feature on the upload page; The preview image now scrolls with you as you move through the checklist.
I plan to extend this to the edit page on posts, but haven't gotten around to it.
If you want to help contribute to the code, there are instructions on the github. If you just want your checklist to be in this userscript format, I would be happy to translate checklists to the proper format. Just leave a link (or the checklist itself) in this thread and I will get to it when I have time.
Updated