i read early retirement extreme, which is a blog created by this guy who lives on $7K/year. he stopped updating some time ago as he got tired of being in the public eye, but he's a fucking brilliant problem-solver. he also wrote a book about it which is on kindle, etc.
http://earlyretirementextreme.com
i'm not financially independent as he is, and i'm more of an epicurean where he's more of a stoic, but i find him *extremely* useful to read. the thing is, he's not in the least "poor", but $7K/year is considered miserly-level wages by people who frequent malls and coffee shops. in any case, great shit to read.
i use public libraries a lot. i have a netflix subscription instead of cable (this is bad for my sports watching but life is full of tradeoffs). i own a freezer, which uses very little energy and can store a lot. i buy and cook food in bulk to save money and time-- then i freeze for later use (this works well with stews and things like that). i'm starting to grow/raise my own food, and there's even the possibility of profit in the horizon. i heat up the house with firewood which provides me with a free workout, and the same with other manual labor--i don't have to pay for a gym.
in particular, i.e., non-repeatable, i live in an indian reservation where i have to pay no rent or mortgage or property taxes, and i have a lot of land/trees around me for free. the downside of this is that i can't sell my property, but i can't use money in the grave anyway.