If you can find a product/service which offers good margins then it is certainly something to consider - affiliate commissions can vary from say 5% up to 30% and many people do make a living out of affiliate marketing. One thing to bear in mind, your affiliates need to have confidence in your affiliate reporting and YOU therefore you might need to join the likes of Webgains.com and Affiliatewindow.com who manage affiliate programs. So not only do they have the systems in place to track and report affiliate clicks/links but they also have the confidence of the affiliate marketing industry - those joining a program know they will get paid. Watch when going down this route as these affiliate marketing companies often charge fairly hefty set-up fees and will also take a slice of every affilaiet sale - as well as the website instigating the affiliate sale.