Whilst travelling, always buy tomorrows food the night before. No matter which country you're in - on what continent, there'll be a shop in a town that's open till late and closes at around 10-11pm. They'll sell off some of their fresh food at around half price (or even less ! !) about half an hour or so before they close up. Saves a fortune over a month on the road.

cut coupons only buy items on sale and then use coupon on top of that
I don't know enough about you to make other recomendations some things I can live without like a cellphone other people can't.
Ones home or cars are big factors downsizeing those are a big start. I have found my tastes get simpler as time goes by. I no longer require these things.
I think for me is just priortizing what you will spend save first before you do anything else. One rule for me is once money goes into my travel fund it is never touched.
oats for breakfast, PB&Js for lunch, rice and beans for dinner, fruit for snacks (pick from trees in your backyard/neighborhood/orchard).
learn local edible plants and fungi - harvest them.
visit your local food bank, soup kitchen (offer to volunteer too).
buy from thrift stores.
grow your own food.
dumpster dive.
walk/bike/hitch everywhere.
trade & barter.
do it yourself.
enjoy the simple life!

If you drink a lot of coffee or tea, invest in a vacuum thermos. Make your hot drinks at home and bring your thermos along with you to work or whenever you're out and about, rather than buying from cafes or coffee shops. It sounds minor but it can really add up fast, and as a bonus, you can bring the thermos along with you when it's finally time for your trip. (I hear the minimalists screaming in horror even as I write this, but I drink a lot of coffee, and so for me, taking along a thermos is well worth the weight penalty. YMMV.)