In every workplace there are problem people causing people problems: authoritarians, boasters and coasters, manipulators, martyrs and meddlers. In this text, leading occupational psychologist Peter Honey gives help with the commonest types of office menace. Always start by looking at yourself - you may be making a fuss about nothing, mis-labelling someone a "worrier" rather than "conscientious and caring", or accidentally triggering and "rewarding" other people's bad behaviour. Once you realize what you are contributing to the problem, it becomes far easier to persuade or encourage the person to change.