I'm about to contradict some tips from people a lot smarter and more experienced than me, but here we go

1-Finish no matter what.

This may seem like a bad idea at first but theres a lot that goes into it

Your brain and body need to function to make a game

This means you need to be well rested, well feed, and well hydrated. If you dont get enought sleep and end up eating some junk food is not the end of the world, you've been a hard working/studying person that maintained healthy eating and sleeping habbits the entire year, endulge a bit! Have some fun!

You gotta actually finish something

This means dont overscope yourself. Make something you know you can finish. Do you have a wedding or grandma's birthday to go to? Lower your scope even more! Want to use this jam to test a new tool or learn something new? Prep in advance. Dont try to make a full fledged steam ready game, focus on the things that matter most for the game enviosined.

PLUS ULTRA

You can try and push yourself all you want but in the end, if the hero is down on the ground, he lost, the hero has to win in the end but not at the cost of his life. You need to have a game in the end and be able to stand up to present it to everyone. That extra UI polish can be left in the trash, dont die for it.

In the end

You finished something, you growed, you learned, you can be proud of that. I know that being healthy should be the number one thing for sure, but theres people out there like me that trive on having a set goal and pushing thenselves to see what they can do and become better because of it. So thats my goal: Finish something I'm proud of.