First, going over the basics: https://trunkbaseddevelopment.com/ explains it
very well.

It seems like everyone in the session is onboard with trunk-based-development
already.

Confidence for TBD can also come from good monitoring.

IMO, feature flags are an antipattern with TBD and mean that you don't make your
changes small enough.

Now moving on to code reviews, and this seems to be required reading:
https://twitter.com/Sageniuz/status/1382230744060342272