What are the most common maintenance tasks for a Vauxhall Astra?

I just purchased a used Vauxhall Astra and I want to make sure I keep it in good condition. What are the most important maintenance tasks I should focus on?

Regularly check and top off the oil, coolant, brake fluid, and other fluids. Also, don't forget to change the oil and filter according to the manufacturer's recommended schedule.

Make sure to regularly inspect and replace your tires if necessary. This will ensure optimal performance and safety while driving.

Keep an eye on your car's battery and replace it every 3-5 years. Also, make sure the terminals are clean and free of corrosion.

Check and replace the air filter when it becomes dirty. This will improve fuel efficiency and prolong the life of your engine.