If you are talking about an object needed, do not use to. If you are going to say a verb next you may need to.
I need a car.
I need to drive there.
I need to be on time.
March 3, 2012
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you have to say to if you are going to say a verb after 'need' . Don't put 'to' if you're going to say a noun after need. :)
March 3, 2012
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In the sample sentence, "You need to think carefully before you make a decision."
The phrase "to think" is a infinitive verbal acting as the direct object in the sentence.
Therefore, in your words, putting "to" after "need" in this case is correct.
March 5, 2012
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"you need to" is right
March 3, 2012
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