Well, if we're going to talk about Dodgson on letter writing and the Wonderland stamp case, the we simply cannot omit:
C. Dodgson, "Eight or Nine Wise Words About Letter-Writing", 1890.
Dodgson being Dodgson, it also contains what he apparently thought to be relevant advice upon the situation when one's mother-in-law turns into a gyroscope. (Dodgson not being married, this must be regarded as rather theoretical, not practical, advice.)