Have been lurking for some time, first-time poster...
Took me about 3 years to get a nearly full load of students. But before I was limiting myself exclusively to clarinet students, until one day one of my friends asked me to teach someone piano, which has been quite successful. (Now about 1/2 are clarinet, 1/2 piano, hence my login name, clariniano) My first private clarinet teacher actually gave me my first two students. Also try contacting other private teachers, even those of different instruments. (I refer colleagues students regularly, and they do the same for me) Paid for a few ads, one in a good classical music magazine, which pulled in 4 students during its 3-month run. Put up several ads in some of the music stores with little rip-off sections that include:
*What you are advertising
* Your first & last name
* Phone (home & cell)
* Email
* Website: (if you have one)
If you teach other instruments, offer clinics at some of the schools. I also attend my private students school concerts when possible, which has drawn a couple. Volunteer at a music camp, have brochures/business cards ready. (A 4-day camp, I gave 20-25 brochures at the camp, which resulted in three students) Offer a gift certificate of lessons at a charity auction.
Good luck!
Meri