LESS IS MORE. Words to live by, particularly when writing dialogue. In her article, How Not to Use Speaker Tags and Action Beats, K. M. Weiland gives some good tips on keeping your dialogue brief, to the point, and moving your story forward.
Another great resource: He Said, She Said: Stephen King’s Advice on Dialogue Tags.
“To write adverbs is human, to write “He said, She said” is divine!” – Stephen King