How do I improve the fuel efficiency of my Vauxhall Combo Life?

I recently bought a Vauxhall Combo Life and the fuel efficiency has been less than satisfactory. It's costing me a lot to fill up the tank and I'm not sure what I'm doing wrong. Is there any way to improve the fuel efficiency of my vehicle? Any tips or tricks I should know about?

First and foremost, make sure you are properly maintaining your vehicle. Regularly check and change the air filter, spark plugs, and oil to keep your engine running efficiently.

Try to avoid idling for long periods of time. If you're stuck in traffic or waiting for someone, turn off the engine to save on fuel.

Use cruise control when driving on the highway. This can help maintain a steady speed and can improve fuel efficiency.

Make sure your tires are properly inflated. Under-inflated tires can decrease fuel efficiency.