You need to do the maths and ask questions that you will only get from the product owner or affiliate manager once you have done all your appropriate research on the intended product’s market.

Every product has a sales volume a market to sell to and an amount of affiliates promoting it.

Take as an example a particular 3D TV model. How many sales of this product are sold in your target market’s country? How big is the 3D TV Market? How many affiliates are actively promoting the product?

It’s very important that your research results in a favorable campaign that will result in 1 – 2k per annum for each campaign you run. The end game is to build on your sources of income from every single campaign you build to achieve the monthly earnings you need to work full time online.

Within one year, you should be earning around 2k per month if you started on the right foot. Find a niche market you are comfortable with and can expand your affiliate business with. Keep your blog tidy don’t show your sidebar full of comparable products… One product one landing page, three affiliate link’s max redirected to the product’s sales page. You can use plugin’s to do the above.

There are many sources you can use for research:
Manufacture.
Product owner.
Affiliate manager.
Government survey sources.
Private survey companies.
Major Search engines.