The FASTEST way to get traffic & leads is PAID MEDIA, period. And in our opinion the best paid advertising platform is Facebook because their ads platform is unbelievable when it comes to targeting (and re-targeting) your audience.
While Facebook  paid ads may be one of the FASTEST ways to get leads, it can also be the most intimidating. 
Paid Advertising is an ADVANCED marketing strategy and involves a significant learning curve. You must be prepared to invest in your education if you expect this strategy to yield financial results FAST.