Oh man, this is such a complicated question because it depends on the industry. I've worked with dealerships to OEMs to gyms to dentists and retailers - and it all depends. Doing a combination of digital and direct is always a great place to start because you have options under both categories. Try running a Google campaign while also cold calling. If that doesn't drive results, try Facebook and networking. The point is to experiment to find what works for you. You might have a strong in-person skill set where others might excel with ad copy. Use what you do best and keep at it! And keep trying new things. You'll find it!