I thought Matias de Andrea's Spotify playlist, which includes recent Flutter-related podcast episodes, is a pretty cool idea.
I'm guessing this might be useful if you find yourself out and about and wanting to learn something worthwhile at the same time. :-)
When you want to do any sort of custom drawing or animation, it's not uncommon to turn to CustomPainter do get the job done.
In this video, I really enjoyed watching Matt Carroll put together a mock-up of a Nest Protect Hero in Flutter, using CustomPainter. I especially enjoyed watching as he built up the overall artwork by starting with a simple dot primitive, then working up from there.