When I was in the 7th grade, I learned a very valuable lesson about work ethic. My friends and I convinced someone to let us help him do landscaping work for the summer. He told us that our jobs were not guaranteed, and that we had to re-earn the right to be considered for a job the next day.
That lesson stuck with me, and has influenced EVERY job I've held since (including my current role).
Work with gratitude.
Work with no entitlement.
Basically, each day I've learned to reset myself, be thankful and make a positive mark on the day.
Takeaway: Whether you are an entrepreneur or work for a company, the mission is the same. Leave positive evidence everyday. That is all.