Example:

My greatest strength is that I have a lot of initiative. I am always looking for a better way to do things at job that I feel would save the company money and I can always achieve my production quotas. For example one time I was working at my station and I felt that I was wasting time by always having to walk to the other side of my station to get some parts. So I reorganized the station and my supervisor was really impressed as it increased my quota.