In college, I worked at a local sports equipment store in Austin, TX called Tyler's Sports. It was a pretty popular place, and at the time it was just another summer job during school. I was making minimum wage, but on the side I read a lot of books about entrepreneurship and had a huge desire to someday start my own clothing business.
A couple of months into my job, I decide to take action on that idea. I found someone who worked in supply chain management in Houston and sent out an order for a bunch of wholesale American Apparel t-shirts. My brother helped me design a logo and before I had ever printed an actual shirt, I sent out a mock up of the design to everyone I knew through email. I was able to scrounge up about 25 pre-orders and enough to send the shirts to the printers. This way, I didn't waste any of my money, but had guaranteed orders coming in after I paid for the shirts to be printed.
The point is, I was able to start what became my business for the next two years all from a measly $250 investment that I had made while working my retail job at Tyler's. What this taught me was that it's not about the amount of money you make from a certain job, but what you can learn to take away from the time you spend there.
For my 48th job, I worked in a retail store called All About You in Mont Belvieu, TX (my hometown). During my time at the store, I thought back to my experience at Tyler's that helped me to start my first business. While working there I asked tons of questions about where we received the products, how much they cost and what kinds of margins we made on certain materials. By being curious, it gave me enough information to learn and then go to start my own business.
Not everyone wants to start their own business, but everyone can learn something from their job. It may be how to talk to strangers, or how to be a professional in stressful situations or just how to properly fold clothes (your wife will thank you for that one, trust me). There's always something to be learned--no matter what job you're working.