One of my favorite podcasts, Get-It-Done Guy (on the Quick and Dirty Tips podcast network), just did an episode about email subject lines. Poorly written (or missing) subject lines are one of my pet peeves. Here are a few points from Get-It-Done Guy, which apply to messages sent by email, Facebook, LinkedIn, or any other messaging system.

• hint at the message’s relevance or importance to the reader
• don’t use the subject line to start a conversation, with lines such as “hi” or “hey again”
• summarize the message in the subject line

Stream or download the episode, or read the transcript: Get-It-Done Guy: Writing Good E-mail Subject Lines.