Ben & Jerry's evolved into what it is doing and is trying to transition its supply chain, but this is essentially retrofitting. In the social enterprise movement, we see companies whose essence, the products they make, the reason they exist from day one, is because these people see something out in the world that they cannot accept.

Look at your business and the activities that you undertake. Then, start to think about not just your economic concerns, but about social and environmental impacts that businesses have.

Business can be a source of progressive change.

Startups are often very undercapitalised, but I found that to be very beneficial because it forces you not to throw money at problems. Instead, you learn all the nuts and bolts of what you're doing and become an expert.

Don't just do something because it's a trendy idea and will make you a lot of money. The reason I say that is because any kind of venture involves going through difficult times. If you're doing something you are passionate about and really believe in, then that will carry you through.

When you are led by values, it doesn't cost your business, it helps your business.

Recycling, packaging, businesses are changing all of those things because that's what consumers want.