i'd have to agree with MohaimenK advertising will help. but, i also agree with Schwettylens, advertising in a local magazine might not be worth the work and expense involved considering the few number of people who actually read through them these days... when i need to find something, i use google.
but advertising in the right way is important, a solid, easy to navigate website with some of your pictures on there along with your contact info will go a long way to making money as a photographer. and Schwettylens mentioned Facebook, that is a great idea that most people looking to advertise might overlook. but you deninetly need to get a website and get your pictures online for others to see.
with the advancements in technology and more people having access to the internet and the sheer number of people using it(heck, i did this post from my phone) as a resource to find what they need faster and easier, getting online should be your first step in advertising.
website, facebook, word of mouth will most likely be the most effective advertising you can do