How Do You Choose Tools That Really Save You Time?

I’ve been thinking a lot about productivity lately. With so many apps, platforms, and gadgets available, it feels like there’s always a “new tool” that promises to make life easier. But at the same time, trying too many can actually slow us down. Chiikawa Puzzle [1]
So I’m curious — how do you personally decide which tools are worth keeping? Do you look at reviews, test them for a while, or stick to the classics that never fail you?
For example, some people swear by project management apps, while others prefer a simple notebook. I’d love to hear your thoughts, experiences, or even funny stories about tools that claimed to be time-savers but turned out to be the opposite.
What’s on your “must-have” list right now?