Direct Linking

Link directly to the product you are promoting. In the past I have seen
something I liked, clicked on the link, been taken to the merchant's
home page and then couldn't find the product I was after! Very
frustrating.

Yes, it takes time to specially tailor your links to go directly to the
product pages but it's well worth it. Some affiliate programs may not
have the facility to do this, if so, get in contact with the merchant
and let them know that you want to link directly to products and if they
don't offer it soon then you'll go to another merchant who does.