The gas price is increasing everyday. I am wondering if there is any way to save gas? For example, drive tips, and maintenance.

Not using the car for short journeys would be a great start.
If you must drive then use a smooth style. Pay attention to the road and accelerate and brake gently..

Lastly dump the gas guzzler and get something economical.

This link will help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post293582

Keep it tuned up and use regular 87 oct gas.