Yep, and so is local personal property tax. I plan on driving my last auto, a Honda Pilot, until the wheels fall off.
Another way is cruise local at 5 gph, there really is no need to be charging around at 150+ knots.
Also, by-pass all the fancy glass that is so appealing. The airplane flies just fine without it. One cheap GPS is all that is needed to get around and if that breaks the bank, sectional charts still work for navigation.
I would not go cheap with an engine. That investment will always pay off in a resale or if you fly the airplane forever, it will last a life time with decent care.
Go light weight as much as possible. It will save gas forever and the plane will fly better every day.
Try not to eat too much. The lighter the pilot, the less gas burned. Most of us could get by on 2/3's what we eat and drink and live longer. More saved $$ for avgas.
I could go on and one....