EAT, PREFERABLY SOMETHING WITH PROTEIN.

 If you think you can eat in the morning without giving yourself a stomachache, you’ll be glad you did so. Nothing’s more distracting than extreme hunger and lightheadedness. If you can add a little protein into your breakfast (eggs, bacon, soy, etc.), it’ll help feed your brain.

 
USE CAFFEINE.

 Whether it’s coffee, tea, or diet soda, caffeine can help keep you alert and perform better. If you don’t typically drink anything with caffeine in it, experiment a few weeks in advance rather than risk making yourself anxious, giving yourself a stomachache, or being forced to go to the bathroom constantly.

 
GET A GOOD NIGHT’S SLEEP FOR SEVERAL NIGHTS BEFORE THE SAT.

 
Try to get to bed at a decent hour on Thursday as well as Friday—being well rested is something that builds up in your system.

 
STAY RELAXED THE DAY BEFORE THE TEST.

 
Try not to study (very much), party, or do anything illegal the day before you take the SAT. The ideal evening probably consists of a fun, relaxing dinner, some TV or a movie, and then a slightly early bedtime.