There's definitely plenty of reading around here, but maybe we can help you zero in on some ways to improve.
What are your priorities? Do you want to save fuel mainly to save money, or are you willing to spend money to save more fuel for the sake of the environment (or limited fuel supply, etc)?
Is your car manual or automatic?
To start with, running high tire pressure (like autocross contestants do) can often improve a car's fuel economy. It's often my first suggestion because it's so easy and free or cheap. You should never inflate less than the car's recommended pressure nor more than the tire's maximum. Experiment in between to find out if handling and/or comfort are compromised. In my cars I always get up to the tire's maximum pressure before comfort is compromised, and handling has only ever suffered on the rear of my pickup at 80psi.
Often, those with manual transmissions can save fuel by opening the throttle more and shifting lower during acceleration, accelerating at the same speed as normal but at lower RPM and wider throttle. That may not be effective on your turbo car, which may spool at low RPM if you open it up like that.
You should put your car in The Garage on this site and start logging your fuel usage there. That will help you identify what works.
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