Tip 1
It is common to use cloaking to disguise the long affiliate links that make it really obvious that a person is doing affiliate marketing. You can use tools such as hyperlink.to or Tiny URL to shorten and cloak the affiliate link.
Tips 2
Doing SEO for your affiliate pages will help you create lot's of targeted traffic. Organic listing on Google get's 4 times more traffic and 4 times higher conversion. Meaning you can get 16 times more traffic without paying a dime.
Tips 3
Doing PPC for your affiliate links. If you want maximum exposure, try creating a landing page with a opt-in form rather than just sending the traffic to the merchant's website.
Tip 4
Register similar domains to the merchant. This is to confuse the market to thinking you are the read deal. Instead of .com, you can register .biz, .org or adding the hyphen such as the-meta-secret.com.
Tips 5
You can use the redirect script to great purpose. E.g. by using a redirect script, you can create a folder - E.g. recommend-internet-ebook and then use the redirect index.php to embed your affiliate link into it. If you have more funds and interested to promote the product on the long term, you can register similar domains and use the redirect script with much prowess.