At the other end of the spectrum is buying leads. This is also not the best option since it can be very expensive and may result in leads that may not actually be interested in your products or business. These are not great leads, either. The best leads will always be the ones you generate yourself—people who have shown some sort of interest in what you have to offer.
Then figure out where your target customers can be found—both physically and virtually. College students who need more income can be found on campus or on online forums or websites about learning to manage your money. Athletes and people who lead healthy lifestyles can be found at gyms and online groups or websites about running, yoga, healthy eating, and more.
Networking, as it used to be called, is a pretty thankless task. The conventional approach to networking was to start with the network of friends and colleagues that you already have; friends and family, your existing clients, your contacts at the squash club and so on. Most people feel uncomfortable pitching to friends and family, unless you have an unbeatable idea or concept, but if that was the case, then lead generation would not be a problem
The reason I started Apache Leads way back in 2003 was that I was a Diamond level distributor for a San Diego based MLM company and had quite a large business. None of my associates had any access to leads, so that's how we got started. The demand for leads grew so fast that I had to focus on getting quality, affordable leads in ever increasing numbers.