I ditto the make your food from scratch idea...it saves SO much...also, for instance, I will save all my vegetable ends (carrot ends, onion skin etc) and freeze it all in a large container and when that is full it makes an awesome broth with some spices added, to cook rice in, or make a soup with...
Also, check into local food co-ops in your area...we were referred by our neighbor to this place where it is like $8 a year to join, and it isn't exactly a co-op, but it is not a food bank either, hard to explain... so I am thinking 'yeah, dented cans of spagetti-os, great' ... but I checked it out and they had SOOO many organic and whole foods things, I was amazed, that has cut WAY down on a lot of our dry stuff...
Also, we stretch things to make them last longer... for instance, we aren't completely poo-free, but I will save an old shampoo bottle, and cut the shampoo in half or more, adding water 50/50 to each bottle... gets my hair just as clean... same with dish soap... also, I clean EVERYTHING with either baking soda or vinegar or a combination...SO cheap and gets everything just as clean....
We save a lot by using cloth wipes, cloth napkins, cloth *paper* towels -- not quite at cloth toilet paper yet, but many times I will use one of our many many washcloths for pee pee (paper for poop lol) which does save on paper, since I pee a lot more than poo and hubby just *shakes* :LOL...
As other posters said, I don't know how the library is in your area, but ours is suprisingly AWESOME... we get most of our DVDs there, books, etc... and they even have a free delivery service so that saves on gas! (good to know my taxes go to something useful haha)
We live in florida too, so we open up the windows and turn off the A/C from about the end of October until well into spring... so that saves A LOT on energy bills... we rarely turn our heat on in the winter unless it is an EXCEPTIONALLY cold night or two...
Turning off your computer at night saves about $10 a month in electricity, I have read...
I have begun taking warm showers instead of the ultra hot ones I used to love... it is not only better for my skin, but it saves a lot of energy from not heating up the water so much or using it for so long... also, my daughter and I bathe together which is SO fun and a great bonding time, and saves on water, electricity...
It goes without saying that we never turn the lights on in the daytime ever, and only keep one lamp on at night that casts a cozy light --unless one of us is reading or something, then we turn another on... but we have been known to light a few candles too instead of turning on any lights -- to save, but also because we love candles!!
Some appliances zap energy even when they are off, just by being plugged in... so we have everything unplugged except the microwave (it is a pain to climb under the baker's rack to plug it in lol)... I have heard that can save you at least $5 a month on electric too... those $5 add up....
We only use half detergent when washing or sometimes just baking soda (we have to go to a laundy mat, we don't have washer/dryer)...and I just pre-treat any stains with a bit of dish detergent or vinegar...seems to get most stains out just fine...
We also buy organic veggies which can get quite expensive, but we will buy a couple of "staples" that can go in many recipes, to cut down on expenses, instead of spending $$$$ of several veggies -- we buy a vitamin packed *all purpose* organic veggie like spinach for instance which is good on sandwiches, in quiche, in omelets, diced up in spagetti sauce, as a salad etc... you get my drift...
I only wear make-up if I am going someplace nice, like a nice dinner, or holidays, or whatever...for every day outings I will add a dab of foundation to a bit of lotion and rub together like a tinted mousturizer, some gloss and that's it... my make-up lasts forever...
When I do baking, I try to do a lot at once so I can take advantage of an already hot oven instead of turning it on/off/on off etc.. I will make big batches of things and freeze individual portions...I did this while pregnant so we wouldn't have to cook in the first couple of weeks, baked goods (muffins, quick breads, bread) does really well frozen... in fact I just used up 5 completely BLACK bananas my mom was going to throw away in a yummy banana bread, and since they were so over ripe, I hardly had to add any sugar at all... it is already gone...lol...
Also in baking, I always cut the sugar and butter in almost all my recipes (by 1/3 or half sometimes) and they always turn out really good and you can't notice... it is healthier and it makes your ingredients last a lot longer...
I find that it is the simple things that add up really...just doing every day things here and there has enabled me to be a SAHM to our daughter on a very modest income....
But, I am newly pg, and after a year of wanting to quit my job (pt) I am finally going to do it! YIPPEE! So I am a bit scared, our budget is super tight and will be even more so after I quit, I guess I am just looking for some good vibes and some good advice from you super knowledgeable mamas. 
And hope to be posting here more!
