The following should not be included on your CV:

 
Photos - unless you are a model, actor, actress or flight attendant.

Any sort of failure - be it an exam, a business or a marriage.

Salary information - this can only be used to reject your application. If an advertisement specifically requests salary information, put it in your cover letter.

Personal information - your weight, height, political persuasion, state of health, state of your marriage, or any other personal information is irrelevant to your application.

Reasons for leaving previous jobs - if an interviewer wants to know, they will ask.

Mentioning activities or interests that suggest lethargy, or vices, such as watching TV and spending time at the pub.

Negative comments about a previous employer or role - keep it positive.

Letters after your name - subsequent sections offer ample opportunity to show off your achievements.

Unexplained gaps in your career history - this only raises questions about what you were doing.

References - it is taken for granted that you have these, so don't include them unless specifically asked; they'll be taken up later.