title: Log information best practice
body: <p>I am doing production support, relying much on log to troubleshoot. I found that the log information is quite messy for now. </p>
  
  <p>Could you provide the best practice or guide to write log information?</p>
  
  <p>BTW: we're using log4Net. Do you have any suggestion on alternative library? </p>
  
  <p>Thanks.</p>