Look for shortcuts  
For example, if you can use multiple choice by substituting instead of solving the problem, do it, save your time.
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  Don't panic,
if a question has an unusual symbol. Just replace the symbol with the definition that accompanies it.
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Don't waste time
 with difficult question. Remember, each of them has the same point  value.
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 Try to guess
  by eliminating unreasonable answers, if you don't know how to solve  the problem.
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Use the ballparking and substitution in multiple-choice part,
  which means you can eliminate unreasonable answers, and
than try to substitute
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No penalty for skipped questions
  on a multiple-choice part, and 1/4 or 1/3 will be subtracted for the wrong  answered questions. There is no penalty for wrong answers on grid-on part.
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  Mark up any diagrams,
  if it will help you. Check the diagrams. They may be drawn not to scale. In this case you may want to redraw the diagram slightly to make it accurate.