Here is another great tip from Anna Dobritt via her blog.
When you write you’re putting yourself out there for the world to see. Every word, every sentence is a part of you. The characters are drawn from the people you know, have met in passing, or seen at the local coffee shop. As a writer, you live in two worlds — one you create for your characters and the one you live in every day. You cross the line between these worlds each time you put pen to paper, bringing the real world to your created world.