How can I improve the gas mileage of my Toyota Camry?

I just bought a used Toyota Camry and I've noticed that the gas mileage is not as good as I expected. Are there any tips or tricks to improve my car's gas mileage?

Regularly check and replace your air filter as a dirty one can decrease gas mileage.

Slow down and avoid aggressive driving habits to improve fuel efficiency.

Consider using a fuel cleaner additive to remove any deposits that may be affecting your car's performance.

Make sure your tires are properly inflated for better gas mileage.

Consider using a more efficient synthetic oil instead of conventional oil for improved fuel economy.