Is it possible for me to improve?

I got 730 in maths, 540 in Writing and 590 on CR. I missed 2 grid ins because I dozed off in the middle of the exam, and apart from those I just missed 1 question. So, hopefully, I can get 770 next time. In CR, I missed all 7 of the hard questions in the passage, and Writing I missed 10 of the sentence error correction. Is it possible for me to improve to 2100? And how do I do it?

The old SAT is no longer administered, try the new sat rumor has it that it is dumbed down