Review Landing Pages
One of the best converting landing pages you can create are product review posts. The visitors to this pages already have some familiarity with the product. Most will have found your site by searching "(product name) review" and want to make sure that the product really is going to solve their problem and is a good buy. Now it's up to you to push them over the edge and get them to complete their purchase.
Expert Advice
The image that you want to come across to the visitor is that you are an expert in the field. You know the products in the niche inside and out and can list the pros and cons for each. You need to spend some time on these landing pages so they look professional. Nobody is going to trust an expert who doesn't put the time into his review to spell check his work.
No Hard Selling
Hard selling on review pages isn't going to work very well. You have to soft sell by accentuating the positives and even pointing out that the product won't be a good fit for some people in certain situations. You do want to make sure that you add your affiliate link to several different points in the copy. No sense getting the visitor interested and have them leave your site to search for the product they want to buy because they couldn't easily click through to purchase.
Limit to 3-7 Reviews
You can either do a review of a single product, or you can do a comparison of several different choices. When comparing products, you should limit yourself to 3-7 different options. If you do fewer than that, it appears that you only know or researched a limited number of options. If you go with more than seven you will most likely overwhelm the visitor and see your conversion rate drop.
Rankings
A lot of affiliates arrange the products in order of commission percentage when doing a review page of several different products. They are thinking in the short term, trying to grab a small amount of additional money up front while not caring about the end user.
My approach is to do an honest review, even if that means putting the most profitable product last on the list. Your visitors will trust your opinion and be more likely to come back for your advice in the future.
Design Template
Again, make sure this page is clean and professional. You want to put your reviews high up on the page with a small amount of text, then have the longer copy below the reviews. This converts best. Someone wanting a quick answer doesn't want to have to read through a bunch of text to figure out who you are recommending.