Sitting in a doctor's office/pharmacy/walmart is going to be about as entertaining as watching paint dry and only a little more profitable. I would only recommend doing it if you have waaaaaaay more time than money. You can get a list of 1000's for cold calling for like $50. Leads are going to be much more pricey but much better in terms of $$/hour worked. Figure out what works for you and tailor your business to that. This forum is a goldmine for useful information.
Also, every single agent I've talked to says if you make it to year 3 it gets a whole lot easier. First 2 years are going to be super rough because you don't have the steady income residuals bring, or the steady referrals that having a decent sized client base brings.
He is selling MAPD and can't do cold calling though