How to be fully engaged with the work you have done for a long?

Do you know people who many years do the same work. Is the expert of doing it, do not really want to change occupation, thinks that the only thing he can do?
Everybody have met all kind of people, somebody from them enjoy learning new things over and over again just to expand his boarders of knowledge and skills, somebody gets specialized in one specific area, nobody can’t tell which is better way to do. However, Robert Kiyosaki business man and author of well know book Rich and Poor Dad has developed an idea that it is not good when young people get specialized in one area too quickly, meaning that people with broad knowledge are better survivors in changing world.
Now back to topic. If a person has decided that learning new things he doesn’t not want, good way how to get newly engaged in work he does e.g. can be a change in a rhythm of day, wake up early, do the most of the work in a first half of day and more time is left for family, hobby. Also, a person suddenly will see his day differently, especially those who usually sleep late. Just do the same think a little bit differently and you will discover how much more fun it is. However, the best way is to state a target for yourself you want to reach with your work and you will have a new load of energy when you will go for it.