Some time my emails have responses; some times there are none for days

This is the problem faced by me. I sometimes feel that my email has important information or I am looking for important decision and I still do not have response. By the way I respond to all emails.  Some times I get responses immediately. Why? Some things that helped me get an answer are

  • Make the email personalized and be focussed on what you need
  • Make sure that the language of your email be well written and articulated. It is not unnecessarily long email
  • Make sure that the email clearly mention the course of action expected.

I would like to know more such practical tips.