Having a solid ethical base can help you navigate even the most difficult business situation. Sure, you can abandon ethics and score the occasional win but in the long run, doing the right thing will protect your business from the sharks.
You put in a crazy day of 10-12 hours and look back realizing you didn’t get a lot accomplished. Ever add something to your “To Do” list that you already did just so you could cross it off? The amount of time we spend working has no direct correlation to the amount of work we get done.