9. There are templates available on the internet nowadays for your newsletter design. Some are even for free and all you have to do is to just fill in the blanks of the template. If you are a bit creative and full of ideas, you might want to do a design of your own. There are a lot of programs out there that allows you to do newsletters from scratch.
10. Not matter how colorful you want your newsletter is, you must remember that the white space is pretty much important too. It provides breathing space to your newsletter and gives the reader the impression that everything is not cramped up.

Photo taken from http://www.ucl.ac.uk