What are your go-to Warmup, appetizer, and "Filler" games?

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So lately I've found I don't have a lot of time to sit down and play a big sprawling session on Civ or Zephon or something. So more and more I've been playing stuff I can hit in short bursts like Polytopia or Into The Breach. Sometimes I'll play like a round or two of Polytopia just as a sort of "warm up" when I'm sitting down to the evening. But I'm starting to feel like I've rinsed those games a bit and need something fresh.

I'd love a few more recommendations for things that scratch that strategy itch a bit, without being big time commitments to finish a game.

Any suggestions?