My biggest success as a business owner was when after about a year of putting flyers in mailboxes, hanging posters in schools, etc.  I built my studio up to 28 students.  I've moved back and now and trying to get my studio up again, and it's been tough.  Attitudes about learning a musical instrument have changed and also the children that become my students.  The world is ever changing, so we constantly have to have our eyes open to everything.