SAT , What Now?

HI all,
I am seeking our advise regarding my situation with the SAT. I am planning to achieve a 2250.

I took my Sat in Dec of 2014 got a 1880 : M:690 W:610 Cr:580 essay 8 ( First time sophmore)
I took my SAT in oct of 2015 and got a 2050 M:690 CR:680 W:680 essay 9 junior year
I also took my sat in November and got a 2100: M:760 cr:680 W:660 essay 8 junior year
I registered for the jan test date

I have taken about 50 practice tests ( not a typo)

For the Oct and Nov i studied a lot of vocab words over 2000 and that raised my cr score for oct although it did not further improve for the nov session even though I had learnt much more vocab. My math scores for the first 2 times were not accurate as I made lots of stupid mistakes and I only made 1 mistake on the November test ( I worked out the diameter instead of radius). Writing I thought I would have maintained my mark or done better although i ended up losing an extra mark on my essay. I feel all my math errors are stupid ones and I usaully do etter at CR and W at home.

My question is very simple, since you now know my situation, what can I do to improve to a 2250 by the JAN session?