What to do in last 30 days for Mains?

Anyone with mains experience, can you please guide on what should be done in the last month before mains?

It's overwhelming as well, I was hospitalized most of preparation due to a physical injury. I'm only now about to finish GS3, none of my other GS papers are even touched (at least not since before pre)

Optional is going well though.

Any advice would be appreciated, thank you.