Always Take Your Break
My sister told me that she works through her break. “It’s only fifteen minutes. Why bother taking it?” Don’t do this. You should always take your break. Always. Why? Because your job will kill you if you don’t.
If you MUST do something during those breaks, use that time to work on your own projects. There’s always going to be a struggle between going for the thing you REALLY want in life, and surviving the obstacles that get thrown your way. We usually compromise by just focusing on other people’s work at the detriment of our own stuff, but I think there’s a better way.