If you do the same type of creative work every single day, year after year, your creative mind will run out of nutrients.
Example: If you’ve been a musician for 30 years and have written the same song hundreds of times, take six months (or a year) off and study creative writing. Take an art class, acting lessons, or travel. All peripheral studies will enhance your life experience and can be used to strengthen your artistic statement.
At the end of 2001, I quit music and devoted myself to the study of sales and marketing, while working at a small advertising agency. 3.5 years later, I released a concept album about what I learned. It was the most engaging and educational creative experience of my life.