In this article we will talk about employees, the impact of stimulation and motivation to their work and of the very theories of motivation and stimulation. Workers are considered as a key factor in the work process for companies so it is quite significant how company treats workers. We are living in time when everything in the world is dedicated to increasing capital, how to have higher earnings and quite often we have witnessed the poor treatment of workers that creates that capital for their companies in which they work. Today stress has a negative impact on labor productivity of employees but if we create a ways to stimulate workers we may further motivate them and thus improve their scores in the company. In everyday environment when we look at companies on the Croatian territory we can see some improvements as far as the treatment of workers, but still there is plenty of negative examples where workers doesn't get paid not even earned wages. Awareness of entrepreneurs, company owners is changing and it is a positive thing that gives us a hint that more companies is trying to increase concern about its workers. Furthermore, the purpose of this paper is to explain how stimulation and motivation affect the workers in their business activities and for this reason we have done interviewing employees in a contact center of the biggest Croatian telecom operator. The information's that we have received from the employees themselves help us in what clearer understanding of this master work and will show us how workers react to stress or how they respond to given bonus and certain privileges in their work.