What email content should go in your newsletter?

[epicstate]

Hey Guys,

What email content should go in your newsletter? I can list some types as following

Promote your blog posts
Send people to other blogs or articles you like
Write product reviews
Tips
Beginnings of articles, find the rest on your web site
Photos of products in action
Videos
Links to articles you’ve written
Downloadable white papers
Personal stories
Surveys

What other ideas do you have? which one do you prefer in the list above or which are yours?