Setting up Adsense vs Ad Exchange compete for your ad space on your site is a sure winner to lift your revenue. Ad Exchange is the premium version of Adsense.. but even medium-range sites can get into Ad Exchange if they register via a Google-certified partner for Ad Exchange.
There is no best way or easy way to make income online. You have to do their best to generate income. Anyways you can perform on Affiliate, Designing solutions, SEO services, PTC, PPC and writing article and produce decent cash.