We're boot-strapping and love this resource! Warning: this is a referral link BUT (hear our plea) if just 4 other people subscribe with this link we can get the service for free (every single penny helps us right now). You can also save 25%. Every one of these videos has helped us in someway but my fav so far is https://www.growthhacker.tv/jason-cohen. I hope it helps others too!