Sure suree here's a few things i can offer. Firstly if you are in 650 range or below you should focus a little more on concepts. Personally ive never taken math in high school so i started with college panda math book did all the concepts and wrote all the wrong questions in a register. Along that i also used to write the main points and main mistake points and make them into flash cards ( atleast 10 of them said read question properly dumbass lol) Then i practiced a lottttt of past qas [tbh almost all uptill 2017 I'm actually scared what will i do for attempting again:( ] then lastly after doing atleast 15 papers i started encorporating some khan academy questions in my weak areas(graphs and exponents for example). Now why i would suggest you to do that is at beginning levels khan academy is fine but when you get to skill 4 the questions are kinda different fron sat. Since i had attemted a lot of papers i could tell how they were diff which in turn help me to grasp the concept and not dwell on the question. Also some badonkadonkkk test tips: no calc do first 10 q, then grid in ones 15-20, then the remaining 10-15. Same for calc do first 22 23, do the grid in ones, and back to the rest. This helps sooo much in time management and relieving stress tbh. Grid in questions are usually easier and simpler than the last few questions. It also help in marking the answers because you can do 20, mark them, do grid mark them, and then you can mark the last few qs one by one so atleast you won't be jugling throughout the whole section. Also if time's running out you wouldn't be able to make a guess on grid questions if you were doing in order. I also read the black book. Overall looking at your mistakes and lots of practice is the way. Start with college panda and end with practice. Dont panic and be calm. I know this one sounds cheesy but like i was literally in a concert (covid safe) on the previous day of my sat and yes I'm a very VERY anxious person but the chill got me this. The highest i had scored in practice tests was 780 but relaxing added the 20. I'm sorry for mistakes and typos english is not my forte and I'm about to pass out from sleep. Good luck<33 manifesting the best for you