How can I make sure my Nissan X-Trail's tire pressure is correct?

I recently noticed my Nissan X-Trail's tire pressure light came on. What's the best way to ensure my tires are properly inflated? Any advice on what range the tire pressure should be?

To ensure proper tire pressure, you should check your tires once a month. The recommended tire pressure for your Nissan X-Trail can be found in your owner's manual or inside the driver's side door. It's important to check your tire pressure when the tires are cold, as driving can cause the pressure to increase. Allowing your tires to have too much or too little pressure can lead to safety hazards, so it's important to check regularly.