Changing your routine and meeting new coworkers will be stimulating and help you to get out of the rut.
I knew I had to get out of the rut I was in, so I quit my job and started working part-time as a website designer.
Japan's struggles started after their housing bubble burst in 1990 and the "lost decade" began in earnest in 1997. They've been unable to get out of the rut.