The Golden Gate Fortune Cookie Factory is based in Chinatown in San Fransisco. It produces 20,000 cookies a day but earns an extra income as a tourist attraction. Every day, tourists pay a fee to see how the cookies are made and no doubt leave with a bag full of the product too.
What is commonplace to one person can be fascinating to others. You may be bored stiff by your place of work, but might others be interested in seeing how you do what you do? If so, there may be a readymade extra stream of income for you just waiting to be exploited.