I think the "do unto others" thing works well when leading re: your subordinates, your customers, your competitors, and your team mates.
While accurate that's a stretch. Do unto others works for everything in life when talking about dealing with others.
It remains my ever-so-humble opinion that the Bible does not teach leadership. It teaches many things, such as faith (blind or otherwise) it teaches us about judgement and judging others, but it does not teach leadership...which was the original point of the thread.
Too many people IMHO try to fit the bible's teachings into everything and frankly it is putting a round peg in a square hole most of the time and does quite a disservice to the actual teachings of the bible. It is also my opinion that most people read the bible but do little to understand it because they are to busy trying to read between the lines.
While I understand that people from almost every faith imagineable and much smarter than I am have read every word and disected every word and they can't even agree on what the bible actual says (because Aramaic doesn't translate into English very well and it didn't translate into Hebrew terribly well either). And given that information, I contend that most people and frankly clergy included attempt to twist the written word into something that makes sense for them but may or may not have any legimate meaning to the original intent of the written word. Which is why I appreciate the bible for what it is, which is a great moral compass not meant to be dissected to the nth degree. If you read something (especially if it was written by or inspired by God) you should be able to easily understand it and you shouldn't have to search for underlying meaning. That is why I believe when you read the bible and understand what is said, there is no reason to try to relate it to something else. The teachings are the teachings and if a given story, such as David vs. Goliath is read and it tells you that the message is...regardless of the odds, brains and intuition can beat mite every time, is there a reason to look further just because it is a story in the bible? Not to me! There is also no reason to attempt to twist that story into something that it isn't. The story is a great story and doesn't need our imput.
Anyway, enough of my thoughts on the bible. I just don't think the bible is the answer to the question of Leadership, just as it is not the question to everything. God gave us free will and many of the answers are supposed to come from within.