I put about 12K miles per year on my car. At 25 MPG, that's about 480 gallons per year. Going from $3 to $4 changes my gas cost from $1440 to $1920 per year($120 to $160 per month).

One thing that has enabled me to reduce the number of miles I put on the car has been the addition of a 100+ MPG moped. But I can only really drive it maybe six months out of the year. I put a few thousand miles per year on it.

These costs alone would be easily containable. But the cost of gas creeps into everything. So I cut back on unnecessary trips and keep my purchases to the necessary.

When it's time to take vacations, I tend to stay closer to home to cut back on the travel expenses.