If you're googling how to improve SAT score in 30 days, the biggest tip I can give is: stop trying to do everything. Pick 2-3 weak areas and attack those hard for a month.
What helped me most was this:
- Take one timed section almost every day, not always a full test
- Review every miss and write why you got it wrong
- Make a repeat-mistakes list so patterns are obvious
- Drill Desmos/math shortcuts because those points add up fast
- For reading/writing, practice eliminating 3 wrong answers before picking one
Also, in the last week, I would focus way more on accuracy than cramming new stuff. A 30-day SAT score improvement plan works better when it's boring and consistent instead of super intense for 3 days and then nothing.