Once you get your campaign to run smoothly and you start to generate a decent amount of income for a few weeks in a row, then you know you have a very profitable product which can bring you a lot of money.

Then it's time to move one step further by expanding your search engine marketing!

On the left you have a list of search engines which also use pay per click programs, so you shouldn’t have any problems when setting up a campaign, because the procedure is almost the same as on Google AdWords.

Join one search engine, establish your business and once you start generating income move to another one. By doing so, you can increase your profit 4-5 times.

Also, join to another affiliate network, see which products do they have, maybe you will find even more profitable products. Most of the networks have over 5000 products and services.
Just find some product that not many people are promoting and your potential profit will skyrocket!