Saving on gas with better grocery planning

I realized recently how much gas I used running errands. Everything is close, three to four miles of neighborhood streets. I never really thought about how many times per day it added up. One of the things was daily trips to the grocery store. My overall grocery bill didn't change but now I can go twice per week, and do that when I'm doing another errand I would have been doing anyway. This has reduced the gas use a lot for me (my car is a small truck), once per week before to once or twice a month now.