Three log lines that saved an outage

Latency budgets work better than latency targets. Targets are aspirational. Budgets force you to delete features when you go over.

If a config file has more than a dozen options, half of them aren't being used. The other half are being used in ways the original author didn't predict.

I write smaller commits than I used to. The commits are uglier in isolation and much easier to read in sequence.

There's a kind of premature optimization that comes from imagining a future team. "What if someone needs to swap this out?" Often, no one does.