This is the most vital element of any high school student’s life. SAT’s will affect almost any career path you wish to follow so it is very important to be fully prepared but the most important of all, is not to panic.
If you do panic then no matter how much cramming and organizing you put into your studies, it will feel like you are never ready, let alone pass.
There are many websites that offer practice SAT tests for free and I recommend you give this a go because it may surprise you how much information has been learned, it is normally just a problem of confidence.