The best way to lead is by example. If you want someone to do something you must be willing to do it first. Truly know what you are asking someone to do by experiencing it yourself. Feel the pain for yourself first. When you know something you can talk intelligibly about it and lead. You will be able to communicate more precisely on the exact outcome you want. You must be able to speak the language of the task. At least know the basics. 20% of your efforts will give you 80% of your understanding on the subject. If you need more understanding then hire an expert.