How to get free premium

Until the 11th, you can get a free 2 week premium membership on chess.com by watching 2 hours of chess streams on twitch. Here is the article for more details: https://www.chess.com/news/view/twitch-drops-2023

It doesn't take to long to do, just have the streams playing in the background while doing other things if you don't want to watch them.

You can use this to get a lot of premium only achievements, such as Introspection and Brain of Steel, or to get other achievements (such as puzzle and lesson achievements) faster.