Workers are more satisfied when they have different tasks than when they to similar tasks all day. Working eight hours a day is not easy to anyone, even if people like their job, most of them get tired along the day. The condition can get worse, for example, if the tasks executed during the day are repetitively. Working on the same activity all day long results in a tired brain and body and in a feeling of being useless. First of all, the brain is divided in many areas, which are responsible for different activities executions. Considering this, working several hours in the same task means the brain is overusing a specific area of the brain rather than the others. The result of this inequality of brain exercise is that at the final of the day there is an increase on the tiredness. For example, I have experienced a job in which I had to work a lot with drawing on computers. I used to use software called AutoCad every day, which requires a lot of mechanical work with the computer mouse. I had to use this tool eight hours a day, therefore, and the end of the day I felt so much pain in my hands and arms. My neck was also hurt because I had to be at the same position to be able to perform my drawing with efficiency. After a three days a week doing this work I felt I was just not able to execute it for the remaining weekdays, thus my productivity also decreased, and it made me feel even worse. Furthermore, repetitively work leads people to feel unable to develop other activities. This is a result of the not using other parts of the brain. For example, in that same work, I was required just the use of the mouse, the knowledge of the software and remembering the commands. There was no need to write or to use logical rationality. Therefore, after a considerable amount of time in this job I felt I was not able to write an entire paper, or to plan a project, because my brain was so used to execute that same task that I had forgotten how to do all the others that once I knew. In addition, I was not able to read books as fast as I used to, because I have got unused to it. In conclusion, I strongly believe that varying the activities during a shift is very important. This is because most people would feel less tired due to the division of work in their own body and mind, and they would also feel more satisfied due to the practicing of different abilities, so developing their skills.