We have yet to hit summer, but gas shortages are already occuring. Now would be a good time to cut back on car travel, if you can. Some ideas:
Take the bus, where possible.
Try "errand pooling" with nearby friends. If you need to go to Home Depot, and your neighbor has to go to Petsmart, and they happen to be in the same shopping center, make a trip together.
If your house uses heating oil, lower the temperature by a degree or two.