My parents DEFINITELY brought me up with a good work ethic.
I like to work. I have worked at all sorts of jobs, with my least favourite being work in a mailroom - which really just involved stuffing envelopes for 3 months. However this is still preferable to not working at all.
Since I became self-employed work has a new importance - it's not just something I have to do every day. Each day is different. But I have to make sure that I'm doing what I need to to ensure I HAVE work every day.
Every bit of work I'm offered matters. And when I can't take work because I'm already working it's good... but still I HATE having to say I'm busy. Especially when the work would pay significantly more than the work I'm doing already.
Still, ethically I know it's better to stick with what I had arranged than to mess about swapping and looking for people to cover my work so I can take on someone elses.
I'll just feel good about my morals... they'll soothe the pain.