I think the only way is cold canvessing, i use to go out every night and i wouldnt go home until i got 5 new customers, ( i hated it!) youde be surprised how much work you will get !. flyers can be thrown in the bin, but actualley talking to them can swing it. Try and get block work if poss, cuts down fuel ect.
Recommendations are your best form of adverts!...GOOD LUCK.