Thought I'd post it here. This is stuff I generally look out for when I make a redstone contraption or when people ask me to review theirs.
https://docs.google.com/document/d/1EFbS7RP9pJWocaF8DcBxv95GcZnOEV9Qis92chTQ9ic/edit
https://docs.google.com/document/d/1EFbS7RP9pJWocaF8DcBxv95GcZnOEV9Qis92chTQ9ic/edit