I recently read a book I would highly recommend if you are looking for gentle encouragement regarding how to live more simply without rejecting modern life. Wanda Urbanska has written a number of books and had a series of shows on TV about simple living.
I found her recent book "The Heart of Simple Living: 7 Paths to a Better Life" to be a good refresher and to also trigger some useful thoughts. Her approach is to get you thinking about a step or two that you could take right now on each of the 7 paths - financial independence, meaningful work, housing happiness, reclaim homemaking, back into the kitchen, the garden, and reclaiming ritual and community for life.
It is the kind of book where you can disagree wholeheartedly with some of her suggestions yet find others that resonate perfectly. I finished the book with two commitments: to building community/creating a bigger more connected life and to postponing purchases as long as possible. Those are my take-aways for the short term; I'm sure there will be others in the future.