well its a little late to start taking practice tests but do a few if you can. other than that just get a good night sleep and stay focused through the whole thing and keep track of how much time you have left.
on the science section. do not read the initial paragraphs for each section, skim the graphs, then do the questions. 99% of the time you are given which graph to look at in the question, and the paragraphs are irrelevant.
save the super long experimental theory problem (the one with all the writing and no graphs) for last. this one takes the most time.
dont let any one question hold you up for too long, if it takes you more than a minute or so, skip it and go to the next, you can always go back
and if you dont finish a section, and are just guessing, dont guess random letters, pick one and stick with it all the way down. this statistically increases your chances of getting some right.
What pro skier would you like to see on dancing for the stars?
Tom Wallisch. For the first time on dancing with the stars both partners would be wearing a dress. - Nomensteven
Truth. Jesus hates you, and you're all a bunch of idiots. I, however, play skeeball with him every Thursday at Chuck E Cheese. - Arabian
googlemaps will rape and pillage canada, one pedophile van at a time. - Frank_Spinatra
It's actually more productive to get a good night's sleep TWO nights before the exam. However, definitely sleep the night before the exam, don't have any caffeine within 24 hours, and eat breakfast before you go.