Here are some 'tips', which help alot.
Remember these things (which you may have forgotten),
Parabolas = x^2 (if a linear equation has x^2, then it's a parabola) (Parabola = Curved Line)
Percentage Error = '+/- of the lowest measured unit, divided by measurement of the unit' eg( 17.1cm, the total error = +/- 0.05cm, and so the percentage error = 0.05/17.1 x 100.
Hmm...
Remember the equity equations? They're important to understand.
What else....
x^5/X^2, you don't divide the number, you minus when dividing, and add when multiplying.
Remember how to draw all the graphs (mean and std dev shouldn't be a prob), the only thing to worry about is time. (never enough)