I had AKG headphones. I noticed a difference when noise cancellation was on, but there was a weird humming sound and they didn't work very well for me. Also, they're very bulky and you can't wear them while sleeping.
> With white noise and earplugs as well, I literally can't hear a baby screaming.
That's one benefit of headphones: if the earplugs aren't enough, you can do earplugs + headphones for ultimate noise-cancellation.
Ear plugs (silicone). Don't waste your money on noise-cancelling headphones, I have $200 ones and they don't compare to simple ear plugs. If you live in a moderately noisy area and you want peace and quiet, get them. They basically just make everything quiet. 24 from CVS = $10.
OpenMove by Aftershokz - Bone-conduction headphones. Perfect for running and just good for listening to music. They work, they're way easier to wear and more comfortable than earpods, I haven't had any issues since I got them about 8-months ago. Plus, you can wear them with earplugs for music + noise cancellation. $99
Cast iron skillet. This is more of a personal preference. I hate getting new kitchenware and then worrying about breaking it or getting it all stained. But these are super easy to clean and AFAIK practically never wear out. Also very cheap (iirc $15).
Software:
JetBrains tools. Basically the only software I can imagine spending $250 a year on, and it actually being worth it.
Patreon and Github sponsors. Not much (I think $15 a month total). It's sad how few sponsors a lot of these projects have. I'm not rich, but I can afford donating $5/month here and there. I really think the world would be a better place if more people donate to open source and content creators they like.
It's the comfort + durability + awareness + good price + still decent sound quality imo, which makes them worth it to me.