In addition to CPA ads, where you are selling other merchants' products, you can try selling your own merchandise or products/services with your brand. This technique works well mainly for popular sites with loyal audience and is hardly the easiest way to monetize a site. You could try to sell merchandise/goods/services as a supplementary service and if you see that this monetization technique works, you can expand the business. CafePress is one of the best places where you can sell merchandise with your logo and the greatest thing is that they print on demand, which means you don't have to keep your merchandise in stock.
The monetization techniques we described here can be combined. You can run CPM ads together with CPA or CPC. You can also combine multiple ads from the same type (i. e. CPM, CPC, or CPA) from different ad networks, provided that this doesn't violate the terms of these networks. There isn't a universal prescription about the best way to monetize a site. The basic rule is that you need to try and see what works for you. The fact that a given monetization technique works for somebody else doesn't mean that it will work for you, so you need to try and see for yourself.