I loved "On Writing". The anecdotes are incredibly funny yet also very insightful. For example, the stories he shares concerning his wife always make me smile, but they also help me things in my relationship, and how it all applies to writing (i.e. support). Another interesting clip was when he discussed his problems with abusing alcohol and drugs. He finally acknowledged that good writers don't have to be in a drug induced altered state to be good.
Three specific things that I learned consist of understanding that the paragraph is the framework of a story, great writers have a talent so you can't make a great writer out of a bad writer, and all you really need is one supporting person to continue writing. I really appreciate this book and all the wisdom and tips it has given me.
