• People must be able to look at your subject heading and know what the thread is about
  
• Make sure that there is reference to the content of your query
  
• Only use all capital letters for surnames only
  
• Subject headings such as "Seeking Ancestor" or "Need help" are not good subject lines
  
• Valuable information to include in a subject line is name, date or time frame, and location
  
• A good subject format might be: William JONES born in Lydney about 1838

Having descriptive titles makes sure that anyone who wants to come back to your question later will be able to find it easily.

When replying to a posting, it is often appropriate and advantageous to change the subject title so people have some idea what the content of your message is about.