I second this recommendation, with an aside: the title was an incredible turn-off to me, but I read it anyway and it is worth its weight.
It is not lessons on "How to be False and Unctuous" or "How to Abuse the Kindness of Others," which were the original images that the title evoked from me.
I have to agree - I found the title monumentally off-putting as well (and wound up reading it on the Kindle to avoid having the book title displayed to my fellow train passengers, how sad!) but I was glad that I read it.
The book seems like it'd be "your guide to becoming a smarmy dick in 30 days!" but it really stresses sincerity and other various laudable goals. A lot of the book is obvious in hindsight but it's pretty well written and has become a classic for good reason.
It is not lessons on "How to be False and Unctuous" or "How to Abuse the Kindness of Others," which were the original images that the title evoked from me.