We mainly use Facebook......I know it divides opinion but I currently don't know any other way to direct your services directly to the people who may be interested in it for the money.
We run promotions and adverts which are centred within a 10 mile radius of our business, targeting people who have specific interest and age demographic.
We set it at a few pounds a day and let it run.
Edit.....don't bother with yell, they are at best con artists who don't deliver what they promise.