My favourite way of driving traffic is to break into local riding stables at night and carve my URL into the side of the horses with a craft knife.
I go to shopping malls and spam the shit out of cars with PE brochures. Best day: 1000 cars, 26 sales.
We use organic SEO, the traffic directly from Google or other SE's.
Article Marekting is the easiest way to get traffic to your site. I submit my articles to EzineArticles and when they get approved then to other article directories as well. That way more people will actually view my articles and I get shitloads of backlinks as well.
Amateur. I take fliers to the mall and staple them to directly to the shoppers, I usually have sneak up on them though so you have to have teh ninja skillz to make bank.
I want to start with PPC, CPV advertisng and my best advertising is SEO and I believe that SEO is fastest conversion rate than any other method..