Google Autocomplete – go to, start typing a phrase and look at the dropdown autocomplete results. You can use the underscore character “_” to have Google fill-in-the-blank. Just make sure the last character you type is an underscore. Try using plurals and change the word ordering to see different results. This is how I find 90% of my keywords.
Let’s say you have a promotions page where you’re promoting a product via affiliate links. If you currently get 5,000 visits/month at a 2% conversion rate, you have 100 referrals. To get to 200 referrals, you can either focus on getting 5,000 more visitors, or simply increasing the conversion rate to 4%. Which sounds easier? Instead of spending months on blogging, SEO, and social media marketing to get more traffic, you just have to increase the conversion rate by 2%. This can include landing page optimization, testing your calls-to-action, and having a conversion rate optimization strategy in place. By testing and optimizing your site, you’ll get far better results with much less effort. 
There is no shortage of products you’ll be able to promote. You’ll have the ability to pick and choose products that you personally believe in, so make sure that your campaigns center around truly valuable products that consumers will enjoy. You’ll achieve an impressive conversion rate while simultaneously establishing the reliability of your personal brand.
Many voucher code web sites use a click-to-reveal format, which requires the web site user to click to reveal the voucher code. The action of clicking places the cookie on the website visitor's computer. In the United Kingdom, the IAB Affiliate Council under chair Matt Bailey announced regulations[41] that stated that "Affiliates must not use a mechanism whereby users are encouraged to click to interact with content where it is unclear or confusing what the outcome will be."

The problem with affiliate marketing, like many other home business options, are the so-called gurus and get-rich-quick programs that suggest affiliate marketing can be done fast and with little effort. Odds are you've read claims of affiliate marketing programs that say you can make hundreds of thousands of dollars a month doing almost nothing ("Three clicks to rich!"). Or, they suggest you can set up your affiliate site, and then forget it, except to check your bank deposits.