Having been involved with Email Marketing for the last 14 years I have found these various tips helpful to boost the results of your email marketing efforts.

1. Get their attention in 0.3 of a second!

It has been said you have 3/10ths of a second to get their attention from the subject line. Keep your subject lines up to 45 characters or less, mention your brand and reference something in the actual body of the Email. It should read like a headline in the Times.  {Ouch}