Keep hair in a complimentary and current style, any length, but not dangling over the face. Every single member of your staff, no matter what the job description, is a Public Relations representative. Just one unhappy worker or one with a bad attitude at any level can do terrible things to your department's image. Another way to encourage people is by putting the right person in the right job. All the exciting and interesting things.
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You learn a lot about people's self-esteem when they answer that question. I like to be left on my own, to make up my mind how to do things. You know immediately that this is the wrong person for a job that's heavily supervised. Work areas quickly become private domains, and rightly so or people wouldn't take pride in them. But if the job requires a lot of space s haring, this employee may not last or do the job well.