- Use spacing to make your message easy to parse.
- Have clear questions that are easy to jump back and respond to. Have them separated out by spacing, and preferably numbered.
- If there's something I need to copy paste, an email address, a specific id, a phone number, then put it on it's own line. Then I can double click and get the whole thing rather then dragging the cursor to do it.
The very first thing you should type after your initial greeting should be your question(s). Don't bury the lede.
You can provide all the additional explanation (i.e. what you were doing when it broke, where you've looked, what you've tried, etc) after you ask your questions. By asking up front, you frame the conversation so that the person you are communicating with can read your supporting information with the correct context.