I am delighted to be going on a short trip to a warm place (Tucson) to do nothing but yoga and visit with friends and acquaintances.
My work life is such for the next several months that I cannot take a long vacation. I can find a few days here and there, though, and it is critical to my working well. I find if I work with too much effort or for too many hours or days in a row, I lose my sense of humor and my creativity. These are truly essential components of doing a good job.
If you cannot get away for a day or two or five, take five minutes to just breathe without following your thoughts. It is not a vacation. It is meditation. It will not serve in the way of a vacation, but it will provide a needed break from attachment (perhaps to the point of misalignment) with the mindstuff (citta) and will enable you to continue with your efforts more at peace with both the efforts and yourself.