I made a very long twitter thread about tips for programming competitions: https://twitter.com/FakePsyho/status/1605570944537280512
(I know it's weird to link to twitter from here, but I thought it's worthy of an exception)
Mastodon is the best way to keep up with what's happening.
Follow anyone across the fediverse and see it all in chronological order. No algorithms, ads, or clickbait in sight.