I don't remember everything that happened in last season of most shows. I will remember most of the main points but there will always be details that I have forgotten.

> How do you all do it?

I will do a re-watch leading up to the release of the new season. I am not one of these people who are on their phone or have the show on in the back ground. If I watch a show I watch it.

For example for the last season of Stranger Things I did a complete re-watch leading up to the release of the first half of S4. Prior to the release of the second half of S4 I completely re-watched the first half.