I will list a couple of the mistakes:

Affiliate Mistake #1 Expecting a visitor to click on an affiliate link.

Visitors need to be encouraged to click.  Advertising has become an integral and noticeable part of our daily lives.  This makes the job of any advertiser, not the least of which the affiliate marketer, an uphill climb.  They’re constantly bombarded by pop-ups, pop-unders, banner ads, sidebar ads and sponsored results.  What’s more, websites are chock full of hyperlinks – even telephone numbers have become “live” thanks to smart phones.  The modern-day website has become a virtual mine-field, leading present-day customers reluctant to hover their mouse over a link, much less click on one unless they’re convinced it will lead them to a desirable outcome.  As with any other form of marketing, you’ll first need to consider the customer’s motivation to click the link.  Only when you understand what motivates the customer can you begin the work of convincing them to click on your link with graphics and copywriting.  If you want to see commissions, you’ll need to lay the groundwork for the merchant you are leading a customer to, which means you too will have to do a good portion of the hard sell.

Affiliate Mistake #2 Selling unsellable products or services.  Merchants and affiliate marketing websites both know if the product they are selling is unsellable. Do not overlook lower placement in an affiliate network hierarchy for a popular item and conversely, don’t be too quick to accept higher-tiered placement for a lousy product.

Affiliate Marketing Mistake 3: Failing to size up the competition.  Best marketing practices are a moving target.  What worked yesterday isn’t guaranteed to win your customer’s favor tomorrow.

Affiliate Marketing Mistake 4: Viewing affiliate marketing as a get-rich-quick scheme.  Wealth is rarely if ever achieved without a major commitment of time, resources and effort. If work is not what you’re looking to do, you should consider another road to riches.

Affiliate Marketers often use services associated with Article Marketing because Unique Articles can create massive amounts of visitors to the affiliates blog websites.