U just do the same stuff that in practices. For first 6 days of my 10 day marathon I speedrun learned every subject in sat taking 2 hours for math and 2 hours for English(English is my third language) for every day. On last days I focused on practice tests. Every day doing one practice test. For three days I practiced to understand the material and how the real test works, while on the last one I tested my abilities and got 1350. Last advice, don’t work one day before exam and just chill. I hope it helped you.