"We live but a fraction of our life. Why do we not let on the flood, raise the gates, and set all our wheels in motion? He that hath ears to hear, let him hear. Employ your senses." -- Henry David Thoreau
Well, one way to live a fraction of your life properly is to spend it reading this book, especially if you're part of that large family of Walden lovers (or smaller family consisting of those who enjoy his other books, essays, notebooks, poems).
It's an eclectic mix, thanks to all manner of present-day writers taking different angles on Henry David and the outsized influence he played in their lives. Thus you get essays on apples (Thoreau preferred wild ones -- even crab apples), small houses (yes, Thoreau's 10 x 15 "cabin" was the inspiration for today's "tiny house" movement), politics, environmentalism, love (supposedly H.D.T. was smitten with R.W.E.'s wife), solitude, weather, economy, writing style, philosophy, Eastern religions, laziness vs. industriousness, etc.
All in all, it's amazing how Thoreau strikes people in different ways and for different reasons, but it all appears well-reasoned, in the end, and will leave you thirsty for revisiting his work, especially if it's been a few decades (in my case, with Walden) since you last read it.
Highly, meet recommended.