Less Wrong Product & Service Recommendations

lukeprog

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:

Post one product your recommend per comment, so they can be discussed and voted on independently.
Provide a link for purchasing the product.
No books, movies, TV, games, or music. (These should go in other threads, like this one or this one.)

I'll post my own recommendations to the comments section, too.

I have often benefited from recommendations for Things I Didn't Know I Wanted.

Rules:

Post one product your recommend per comment, so they can be discussed and voted on independently.
Provide a link for purchasing the product.
No books, movies, TV, games, or music. (These should go in other threads, like this one or this one.)

I'll post my own recommendations to the comments section, too.

How? Well, you kind of answered the question already! http://www.lukew.com/ff/entry.asp?1508

Amazon doesn't disclose details of the Prime program publicly but according to estimates Amazon Prime members:

Increase their purchases on Amazon from $400 a year to $900 a year after they join. (source) Spend 130% more than regular Amazon customers. (source) May be responsible for as much as 20% of Amazon's overall sales in the U.S. (source) 82% of Prime members buy on Amazon even if the item is less expensive somewhere else (source)