Here are some checklists from someone knowing his stuff (he seems to be creating GBit networking stuff among other things):
https://web.archive.org/web/20201112034911/http://www.hottco...
https://web.archive.org/web/20201224132837/http://www.hottco...
...
One thing I'd add to the schematic checklist is "label every net". It makes setting up net classes much easier and clearly communicates the design in the layout.