One of the best things we have done in marketing is to publish a company newsletter. Statistically a newsletter is read by 3 other people besides the client before being discarded. It is also a great tool for upselling. It gives you a venue for showing off your expertise and doesn't come across as a advertisement. We send it in a separate envelope, not in the monthly statement. It will really set you apart from the competition. When it is done right, your clients will never even think of looking somewhere else. We do ours in full color. I would highly recommend doing this.