Hang out at your local airports as often as possible. Post a sign on the wall offering pilot owners at the FBO to wash their planes in exchange for money OR flight time in their bird (with your instructor of course). I'd let a student taker mine up for an hour for a good washing (no touch and gos though). This is what my brother in law does and he logs quite a few hours this way. The important thing is to network, network, network. Meet pilots, but don't beg them. I have a few around the field that I avoid due to their begging posture. Treat it as a transaction and find a way to make it benefit the aircraft owner as well. You can find some good de-greaser and other cleaning materials at
www.sportys.com
You could also talk to local flight schools and find out if they are interested in giving you free lessons in exchange for you giving their students free lessons after you get your CFI. Talk to the owner, be professional, and make a proposal that's been well thought out with timelines, and have a nice little proposal all written out. This is how people get money for start up businesses from banks and investors.
Go to the AOPA website and read the articles they have all grouped together in a section for flying cheaper.
Good luck! If you're near the midsouth let me know and I'd be happy to help.