How can I improve fuel efficiency in my Vauxhall Corsa?

I recently purchased a Vauxhall Corsa and I've noticed that I am spending a lot of money on fuel. What are some methods I can use to improve my fuel efficiency?

Regularly check and replace your air filter to ensure proper air flow in the engine.

Avoid aggressive driving and try to maintain a steady speed to reduce fuel consumption.

Consider using a high-flow exhaust system to improve fuel efficiency.

Make sure your tires are properly inflated and aligned for optimal fuel efficiency.