i go to my local thrift stores almost once a week, if i see anything that looks like its worth more than what they are selling it for i buy it and put it on ebay. recently bought two NOS car audio FM converters at the thrift store for $2 each and sold on ebay for $60 and $70 each. In December I made over $600 selling on ebay but it all went immediately to bills and a couple christmas presents for my boy. But I will sell anything, clothes, dishes, furniture, record albums, electronics, etc etc. especially if its vintage it brings more money. You just have to have a good eye for stuff.
I also frequent a very large and old junkyard and have done pretty well pulling parts for resale on ebay from there.
I have had much more success on ebay than on craigslist, I haven't sold anything that i've posted on c/l ever. it seems like the ads just get buried too quickly.
I also save all my change, pack all my lunches, stay away from the snack machine at work, try to eat out as little as possible and hardly ever go out to movies, bars, etc. I live only 7 miles from work but I try not to go home on my lunch break unless absolutely necessary. I do however, use my vehicle for errands at work almost daily and I get paid for mileage for that so that helps.
I smoke but have cut down to less than half a pack a day, that saved me $15/wk.
Like to have a beer now and then but I get whats on sale at the grocery, not picky about it, and stay away from the imported or gormet beers. Try to buy household consumables like toilet paper and paper towels in bulk at the club stores. Buy all my clothes at the thrift store except for underware and socks, and usually get those for christmas and birthday presents. also use gift-giving occasions to get something that is needed, not a luxury item. try to do repairs around the house myself unless it absolutely requires a licensed professional (gas, electric). also drive two old cars daily that I own outright so no car payments and they are not perfect so insurance is a bit cheaper.
What is killing me right now is paying health insurance for my family. costs me a over a third of my meager paycheck every two weeks. Wife moved out (we're seperated but still married) and she has some health issues so I can't bring myself to take her off the insurance otherwise she would be SOL.
now you might wonder how big my car fund is, well, its at $0 right now because I have to do all these things just to stay afloat and keep the bills paid on a yearly wage that is just over the federal poverty line. However, I'm not complaining, i'm just happy to still have a job and be current for the most part on my bills. tax refund time might see some new parts on one of my vehicles but i haven't decided which one yet haha.
-Tim