Realize that you are never done in improving your marketing methods. In the world of affiliate marketing, there is ALWAYS something new coming along that can increase your click throughs, drive more visitors to your site or improve your analytics. Keep your eyes and ears open for these new ideas and see if they have value for you.
Not all affiliate websites are created equal. A few can be almost impossible to navigate. If the affiliate site is difficult or badly designed an effective affiliate marketer will learn how to overcome those short comings and increase their profits. This can help build trust and increase sells.
Be honest about being engaged in affiliate marketing. Tell people who you are affiliated with. You should also tell them about your site and what it is all about. When you are truthful with your customers about affiliates they will be more apt to visit. Stick with an affiliate marketer that constantly churns out products. If a company is always putting new products on the market, this is the one you want to go with. Fad products might earn you a profit in the short term, but are detrimental in the long run.