At some point in every Realtor’s career, a coach or managing broker will tell them that door knocking is a great way to generate leads and learn how to sell. Although it’s great advice, fewer and fewer new Realtors are taking it. That’s a shame, because unlike say, Facebook retargeting or lead generation websites, door knocking will only cost you shoe leather and time. If you’re ready to get started or are curious about best practices, we put together this guide of the 19 best tips and strategies from door knocking experts who’ve made millions from the technique.