Its pretty important dude. More and more schools are looking at the breakdown, but you have to have that total score in order to pass most of the cut-offs. If you have taken 3 or 4 SAT practice tests (which I recommend everyone to do before the SAT, tutor or not), and you still arent happy with your score, take the ACT. Its not as evil as the SAT, as in the questions do not intentionally mislead you (they're just harder on average). Give it a shot, see if its your thing - most colleges accept either. If you still dont have that awesome score, you'll just have to buckle down and get some good letters of recc to win the admissions people over once you sneak onto the wait list.
For math, just some advice - slow down. If you do just the 2/3 of the math problems that are 'easy' or 'medium', and get 90% of those right, thats a solid 500. Dont be afraid to leave it blank - getting easy questions wrong because you misread them is a common score dropper, and why spend 5 minutes on a hard question you might get right when you can earn the same amount of points spending 2 minutes on a easy one and double checking your work?