What motivates you to do good job?

I feel that good job means where you find good culture and good working environment & which you do satisfactorily, enthusiastically and confidently with high spirit of excellency.Therefore I would like to state that I am highly motivated by my confidence to excel in my life. It is obvious for some people the motivation is required but for some others their confidence is sufficient.i.e they are self starters and I believe that I am a self starter to do a good job.