I have developed a strategy lately that is making my day more productive: I only answer emails at the end of the day, this will eliminate the useless back and forth especially between the stakeholders. I found out that short, 2 sentence max emails (in most cases) tend to be very effective and straight to the point.

In a past life, I used an e-communication system that required us to number the paragraphs. Paragraph 1. had to state either:

1. Action required para x.

or

1. No action required, info only.

That worked well. Somehow we forgot how to do that.