TOEFL

Preparation tips can be really long and how well you can follow the documented tips will vary from person to person so I will suggest you start with the basics and a mock test of SAT and TOEFL to understand your areas of weakness and strengths. Research firstly on TOEFL and SAT score requirements of various universities. Experts say that the SAT is more in favour of verbally inclined students, so read a lot , learn new words.However this does not indicate the math section is easy so learn short cuts and tricks. Practice is the key. Read textbooks, encyclopaedias, journals and research articles for both TOEFL or SAT. Here are two blogs which will give you an overall way to handle the stress and succeed in the tests
https://www.englishclub.com/esl-exams/ets-toefl-tips.htm
https://www.usnews.com/education/best-colleges/test-prep/articles/2010/05/21/test-prep-9-tips-for-sat-success
All the best

Test of English as Foreign Language (TOEFL) is the most popular English proficiency exam accepted at North American universities. TOEFL tests the international students usage and understanding of North American English as it is spoken, written and heard in college and university settings. The TOEFL test is developed and administered by Educational Testing Service (ETS), which sets the questions, conducts the test, and sends each examinee the score report.
Often, students are confused if they need to prepare only for TOEFL or other exams are also required for admission to theUS and Canadian universities. How many exams you need to prepare completely depends on the type of course you are applying to. For all undergraduate courses in theUS and some in Canada, you need to prepare for SAT. For MBA courses GMAT scores are a requirement; similarly, for MS courses GRE scores are relevant. Along with all these exams, you have to take either IELTS or TOEFL.
Often international students dont know how tochoose between IELTS or TOEFL, as universities abroad ask for either exam scores. SinceTOEFL syllabusis designed to test your understanding of North-American English, it should be your first choice if you are applying to universities in US and Canada. For rest of the countries, especially theUK and Australia,IELTSis usually the more preferred language exam, but TOEFL is also accepted.
TOEFL test is conducted round the year and has more than 50 test dates per year. You can retake the test as many times as you wish, but to take a re-test you have to wait for a 12-day period after attempting the first test.