That's a million dollar question. Best thing to do is keep track of all you customers and estimates you go on and solicit them regularly.
Then try different things like, the paper, phone book, mailers and flyer's. Make sure you put in the effort to knock on the neighbor’s door where you last worked. If you want commercial do the same, plus go to different business and ask for work. Make 10 phone calls a day to businesses you’re interested in.
Every area is different and responds differently to advertising. Good Luck!
