There's a book called "The Complete Tightwad Gazette" that is amazing. I got it from Amazon. Don't remember how much it was but it's worth every penny. Hundreds of ways to cut expenses and save money. With money as tight as it is for most folks, every little bit helps. Every dollar I save on living expenses now is a dollar I can put towards preps so that maybe I'll be able to live tomorrow.
The way this lady approaches grocery shopping, clothing her family, and stockpiling supplies is totally prepping mentality, whether she knows it or not. The book is a few years old but most of the info still applies today. She's all about simple living and not buying into a commercially-driven lifestyle.
I've put a lot of her ideas into practice since the first of the year and I've managed to "re-route" about $9000 that would otherwise have been spent on BS or just plain wasted. I'm not exaggerating....I added it up.
You need to check this out and, no, I'm not affiliated with the author or get anything for promoting the book.