Know what? I want to give it a shot this year. I think the most I have written before has been 5k words, so any tips? How should I prepare?
To prepare? No.
Just don't stop writing. Don't overthink. Don't edit as you're going (this is the hardest part for me).
The goal is not to write a perfect novel. The goal is just to write and write and write. It does help, though, to set up goals for word count so you don't get behind.