Hands down I’d say the best thing you can do is research 1 primary keyword, craft an enticing article title that includes your keyword (though it doesn’t have to be an exact match), spend time writing your search engine snippets (SEO titles/meta descriptions), and by far the most important is making your content as VALUABLE as possible through videos, nice graphics, table of contents, bold/colors/styling, etc. Small things like keyword density barely matter.
One last thing to consider: even if your product listings point to reputable retailers, visitors might be confused or freaked out when they’re sent to other sites when trying to purchase your curated products. By being upfront about your affiliate relationship and how the site works, you’ll increase trust and remove any doubts they have about shopping with you.
If you can strike deals with local businesses to score your users great discounts, you can rake in an immense fortune in commissions. The internet is rife with daily deals websites because they are considerably easy to set up and the business model is rather straightforward. The more deals you dispense, the bigger the affiliate commission. You can serve adverts on the side to supplement your income.
In short, you must create excellent content, which will drive high quality traffic to your site from free search engines, at which point you can “pre-sell” those visitors by giving them so much awesome information that when you make a product or service recommendation, they are happy to buy. THAT is when you can monetize. I highly recommend you read this full article on the CTPM process as I use this process for ALL of my affiliate marketing websites.