Pet peeve: people who email me and use just the name of my organisation as the subject line.

(1) I know I work here but thanks for the reminder 😅
(2) Perhaps this makes the email easy to find in your email archive but not in mine 🕵️‍♀️
(3) You can make my day by adding details like your name, your organisation, or even a description of the thing you're contacting me about 😺