Make a double batch of something. Use for left overs or freeze. I like to make a double batch of enchiladas.
Price compare sales at all the local grocery stores near you.
Keep your car tuned up.
If you can invest in a freezer. I have one and I love it because I can stock up on meat/etc. when it goes on sale. A freezer works less the more full it is so you can fill up milk jugs with water which is good for if your water is ever temporarily turned off.
Go through your cell phone bill and see what features you don't need or can downgrade on.
I personally haven't done this but you can make your own cleaning supplies for so much cheaper and they seem to be healthier.
Eat less meat :)
Call your car/home insurance company and see if you can get a discount..there's several out there.