Best techniques to get traffic to amazon review website ?

Youtube, Youtube and Youtube! - Simple Videos spread via your SMM campaigns will greatly help. Capitalize on long tail search terms and title your videos around these.
Find tweeters that have your products on them ie "Looking for a camera" or "What camera should I buy" - Sometimes these hit and convert big! Here's some other ideas:

Niche Blog – is by far the most useful way employed to increase your Amazon web traffic. There are number of reasons for it. First of all, it is not difficult to start a blog, second of all this ad will always stay there, and it works because search engines will pick up on keywords (such as your product name), and create organic traffic – which is the best kind of traffic, which means you know how to increase sales on Amazon.
Video Marketing – works better for some types of products than other. Featuring a toy or some buzzer vs. showing a book is a great example. Videos work for products that require action. However some Amazon sellers are not very comfortable with recording themselves or their family on video.
Social Marketing – is usually a support tool for the previous two ways of how to increase sales on Amazon. People rarely talk about a product itself, but rather may share a link with a friend about an interesting article or video (be it informative or funny).
Paid Ads – is a non-organic way to increase Amazon web traffic in the attempt to achieve Amazon sales growth. Basically you pay to others (for example Google with their Adwords program) to show links or banners with your product. When someone clicks on the ad, you pay. If no purchase is made, you still pay. You need to have some cash on hand, and be sure that the added traffic actually convert into sales, which is our next topic on how to increase sales on Amazon.

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Most people will work their tail off to get their site ranked on Google. That is how most Amazon affiliates make their money online.

One problem though......

Not every person's review page will get indexed and get loads of free traffic for life. The fact of the matter is that most internet marketers will fall flat on their face because of this useless strategy. They work very hard at trying to do everything right so that they can get on page 1.

That's one of the biggest reasons why most internet marketers will fail.

If you want your "review" website to get as much traffic as possible, why not just focus on one single page or review and then use all of the paid and free techniques out there to get as much traffic and sales as possible to your review sales page?

I would say shoot videos and upload them to Youtube as product reviews and then direct all the video traffic to your site.

Well you need to try long tails organic terms (lets say at least 4 words). Then video marketing like youtube , dailymotion, vimeo, etc... optimize the tags, title and description to your keywords, try to gather also some high retention views, likes and favorites to rank your video in youtube to first page.
I am pretty sure when you reach page 1 of youtube search you also increase a lot that term in google and all of it will bring you traffic. Now you also need to have an high quality video so people trust in you and in the product you are reviewing/promoting.

Youtube has been mentioned over and over and the fact your market is cameras they are likely to be looking at Youtube for tips. The other option is to build community sites or fan pages around photography as well as Pintrest feeds for all images that point to your review site. You might want to focus on really high quality camera equipment images or photos with detailed specs on the same raw settings that then link to that camera on your review site.