Decisions: Terri Kelly - WL Gore & Associates - CEO and president of the US gore-tex maker

... was to take a leap outside of my comfort zone. A lot of people didn't think it was possible to sell Gore-Tex fabrics to the armed forces, and one of my early projects was to develop just that. I knew nothing about the military or its specifications, so the learning curve was just phenomenal. There was a lot of scepticism as to whether we'd ever succeed, but that was the beginning of a whole new technical segment for our fabrics business. It's now one of our most successful, so that's a source of pride. I learnt a lot from the experience. At the time, I questioned whether I could be successful.

Another best decision was marrying my husband. If I think about my work and that we have four children, it's quite a juggling act, and having someone who supports me is really great. I always feel that there's a healthy balance for me in being able to pursue what I love to do and yet still have a family that is stable. My husband started in banking, but when we ended up having our twins he decided to call it quits, so he's running the household right now.

MY WORST...