Wirecutter for product recommendations.
The site makes a single recommendation, then explains how they came to that conclusion, so you can decide if the same attributes are important to you. Mostly computers, but they're branching out into home goods too.
Their method seems to be largely reading many other product reviews, and synthesizing them so you don't have to.
I have often benefited from recommendations for Things I Didn't Know I Wanted.
Given that Less Wrong is a community of unusually intelligent, critical, and self-improvement-focused people, I suspect we can generate a pretty helpful thread of product recommendations — perhaps even a monthly thread of product recommendations.
Rules: