What's a small home upgrade under fifty dollars that actually made a difference

[CodeOracle]

Not looking for major renovation ideas, more the cheap small changes that had a surprisingly outsized impact on daily life at home. Could be a gadget, a piece of furniture, a repair, anything that cost less than you'd expect for how much it actually improved things

Curious how many people have one of these that they don't think to mention until someone asks directly, since the cheap wins often get overshadowed by bigger project talk