How to keep personal issues away from workplace

Many times we often find ourselves in situations where our personal commitments collide with our duties at workplaces. It may be that there is something happening in your family that makes it difficult to fully concentrate at work, or you are having issues with friends and neighbors that are weighing you down. Also many times, it is a romantic relationship that interferes with your concentration at work. What could get worse in this situation is when your better half happens to be a colleague or your boss!

So how do you prevent your personal life from affecting your job?