There are many ways to prepare on your sat’s. It is always best to plan well in advance and you will be more relaxed because panicking will make the situation worse and achieving the best grades possible will open up offers from top U.S. colleges.
Decide how much time to allocate on each individual subject but split it evenly to ensure as much ground is covered as possible so there is no place you may not feel fully prepared. Even the most organized of people will never be 100% ready for any exams looming.