There are a lot of different kinds of letters. A very successful sales letter that I've used in countless industries is what I call the assumptive letter. The assumptive letter is based upon an assumption that people reading the letter will think you are personally writing to them. It will start with an assumptive statement:

"Dear Prospect:"

"I know you've...

When you are writing online for your blog you will need to develop a certain style that will identify you, that you are going to stick by… most people refer to this as developing your own “voice” as an internet writer.

If you want to develop your voice as a writer, the first thing you are going to have to do is determine the types of emotions you are going to want to convey and start writing your text based on that; after having tried out various styles you will find one that suits...