@asker - "had better" 08:06 Nov 14, 2010
Just to clarify what your problem seems to be if I understand you rightly (yes, Cilian!), here is a passage from the Dictionary of Contemporary English: DCE p 130:
had better a) used to give advice about what someone should do or say or to say what you should do or need to do:"I'd better go and get ready". "I think you'd better ask Jo first." "Better just check she's O.K". "You had better not tell Oliver" (=it's not a good idea) .
b) used to threaten someone. "You'd better keep your mouth shut!"
In speech, people usually shorten had to 'd and may not pronounce it at all. But do not leave out had or 'd in writing: You'd better come here (NOT you better ) | 
The translation workplace 
peer agreement (net): +7