I found here a few examples : http://www.nciku.com/search/en/detail/had+better/1280917 I had better go 我得走了 you had better do it 你最好做这件事 I'm not clear about this matter, so I had better keep quiet 我对这个问题不清楚，只能不赞一词 He is so overcautious and timid that we had better not consult with him 此人胆小怕事，不足与谋 You had better hide 你还是躲避起来为好

I think you mean "had best", "had better" or "may as well". These phrases translate to a very soft way of saying "need" or "must" or "should" For example, if I say "we must go now" then that is fine but if I want to be more vague, and therefore softer about the sentence than I could say "we had better go now". It just changes the sentence from neutral to softer. I hope this answer is clear.