If you know, there is a huge market for referral income. You can start through online website products, but I highly recommend you start working with any local business and generate leads for them. For instance, you can generate leads for “Locksmith” keywords such as San Diego Car Keys Locksmith or Chicago Car Keys Locksmith and sell these leads to genuine local locksmiths working in the area for which the lead is generated. You could start by offering a few free leads to your potential clients. This way you have already proven your worth. Everyone loves new business. So you are unlikely to get a NO for answer when you offer free trial leads. You can try this method with other local businesses as well. Replicate the business for as many cities as you can. If you have trouble generating leads for tough keywords, try to focus on more niche segment with little competition in terms of other lead service providers. Also, try to rank for long-tail keywords and generate business leads through them.