For me to stop life getting boring and work for that matter it's all about constantly improving and moving forward as opposed to standing still or moving backwards. Having a goal or something to work towards gets me out of bed. Regardless of whether i will ever hit those goals it's still a challenge and something to aim for and drive me.
You need goals that are achievable though and realistic so you feel rewarded when you hit them. I set about 10 goals this year and i've hit atleast half of them, and i am well happy about that.
If you just keep cleaning windows forever and ever with no change it is going to get tiring and boring. Even if i can just make small improvements here and there, that is what drives me forward. How can i improve my technique, earn more per hour, work less hours, cut costs down, get better customers, convert bad payers, price higher. The list goes on and on. Point is that is what keeps me interested in doing the job. Otherwise work will just feel like work without any real direction. Then you could end up just becoming like some of the employee mindset person who hates their job and it's a struggle every day.
Sometimes the Journey is more exciting than the destination. That's just my take on things anyway through the eyes of a 24 year old welshman LOL