Well, I wouldn't say that we are really negatively affected, but we have changed some things because we are concerned. First, my husband bought a Miatta to drive instead of his SUV. He always wanted a 2 seater car, so now he uses it all the time when the weather is good. We didn't sell the SUV, because we need it to haul bikes, canoe, and most importantly, get up our street in the winter. Yes, we are fortunate that we can afford to buy a 3d car. So far, the savings have been good. The Miatta got 31 mpg last fill up as opposed to about 16 for the SUV.
We are keeping our vacations local and short. Our "big" trip this year is a 4 day bike tour/camping trip from Concord to Northampton. We turned down an invite to do a tour in Canada with friends.
My husband rides his bike to work 2 days a week in the nice weather.
I am no longer working. I plan my shopping trips/errands more now, so I am not wasting gas. My car gets about 20 mpg, not horrible, but not great, either. But, it's a small luxury car that is 5 years old and only has 45,000 miles on it. I fill up about once every 10 days to 2 weeks.
I ride my hybrid bike to the gym, doctor appointments, some errands at least once a week. I also try to shop at local farm stands at this time of the year during these trips.
When I go back to school in the fall, I will drive to the commuter rail (5 miles), park in a free lot provided by the grocery store, and take the train to Cambridge. My classes are in the late afternoon and evening, so I don't want to ride my bike home in the dark.
These aren't huge things, but they are changes.