Actually use the product before reviewing it
The most common failure mode in blog product reviews is reviewing products the author has not genuinely used. Readers sense this immediately: generic language, lack of specific observations, absence of the friction and surprise that comes from real use. A review that shares your actual experience — what setup was like, where you ran into problems, what works better than you expected — earns trust and earns repeat visits. Affiliate income from genuine reviews compounds; income from shallow reviews produces one-time clicks and zero repeat trust.