What small changes reduce household emissions the fastest?

I’ve been trying to reduce my household footprint without completely overhauling everything at once.

There’s a ton of advice out there, but I’m curious what actually makes the biggest difference early on.

Things I’ve looked at so far:

• Switching to LED lighting

• Adjusting thermostat habits

• Reducing food waste

• Cutting back on water usage

For those who’ve already made changes — what had the biggest impact for you right away?

Would be great to hear what’s actually worth prioritizing vs what just sounds good.