1. starts with a sense of calling from God.
2. is a gift from God.
3. requires preparation.
When God calls you to something (point 1) he gives you what you need to make it happen (point two). I didn't have a chance to share what Moses told Joshua before he died...
The Lord your God himself will cross over ahead of you. He will destroy these nations before you, and you will take possession of their land. … And the Lord … will deliver them to you,… 31:3-5
Moses understood how the impossible happens...he had seen it enough. Moses realized that miracles don't depend on the leader but on the leader's God. God is ahead of us fighting our battles for us and clearing a path. In fact, God appeared to Joshua as the "commander of the Lord's army" in Joshua five, revealing that God is actively involved with our concerns.
As you go about your day/week, remember that you are not alone in your struggles. God is fighting for you, clearing a path for your success. Don't give up. Continue on and you'll achieve whatever you sense that God has called you to do.