You might want to email your customer/client base in order to:
- launch a new product
- promote a sale/event
- inform about a change/update
- send a seasonal greeting
- change your branding
- remind them you exist in a thousand other ways.
Larger events may need a more hand-holding approach such as:
Email 1: X will happen on 25 July 2007 – get ready!*
Email 2: X is happening right now! Don't miss out!
Email 3: X was a phenomenal success! Didn't make it? Don't worry…
I can make sure your message is clear and that the Call To Action (CTA) actually inspires action.

*This is my birthday, incidentally.
