At the site of Romanitas Press there is a useful post with tips about how to serve Ember Days Masses. On Ember Saturday there are a lot more things to do and a server can get scrambled around.
The tips could be helpful for priests too. For example: “Note well, that the priest never goes to the center of the altar before saying “Oremus,” etc. before each Lesson.”
By the way, the Latin name for the four sets of Ember Days is Quatuor Tempora, Four Times. There is a connection with Japanese food.
In the 16th c. Spanish and Portuguese missionaries settled in Nagasaki, Japan. From their interest in inculturation and out of sensitivity for the ways of the people, they tried to make meatless meals for Embertide, which is a fast time. They started deep-frying shrimp. The Japanese ran with and developed it to perfection. This is “tempura,” again from the Latin term for the Ember Days “Quatuor Tempora“.
Speaking of Japan and missionaries…
It’s a hard read. Give it to a priest. Scare him.