SAT

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

SAT 2017 is an internationally recognised standardised test that evaluates a candidate's knowledge in reading, writing and quantitative aptitude and other specialised subjects. SAT 2017 is taken for undergraduate admission in the United States and some other countries. It assesses how well the test takers analyse and solve problems. It is usually taken by junior and senior high school students and is based on subjects taught in high school programs. SAT test 2017 is of two types: SAT Reasoning Test or SAT and SAT Subjects Test.
SAT 2017 analyses a candidate's ability in four sections - Evidence-Based Reading and Writing, Reading Test, Writing and Language Test and Math. Subject Tests are hour-long, content-based exams that assess a candidate's strength in specific subjects. Unlike the SAT test, some colleges require or recommend that you take SAT Subject Tests. The SAT 2017 is offered seven times each year in the US and six times internationally. Candidates can sit for the SAT test 2017 in October, November, December, January, March, May and June.
SAT is owned, published, and developed by the College Board, a private, non-profit organisation in the United States.