I’ve just been reading a post on the Writer’s Resource Center called The Five Habits of Successful Freelancers. Here’s an excerpt:

To be a successful freelancer, you need to look like a professional. You may write in ripped jeans or pajamas, but your work should be immaculate. Your queries should be well-written, clean and perfectly formatted. Your finished products (and anything else the client sees) should be of equally high-quality.

I think there are great lessons here for every freelancer.