"I have made this letter longer, because I have not had the time to make it shorter."
Achieving leads by word of mouth is a particularly effective marketing strategy since it indicates a recommendation by a trusted third party. Ask your satisfied clients for referrals. Give free consultations to new referrals.
It has been said that a monkey, randomly typing away on a typewriter (in the days when typewriters replaced the pen or plume as the preferred instrument of writing) could re-create Shakespeare-- but only if it lived long enough (this is known as the infinite monkey theorem).