When we're disconnected from God (or Spirit, or Higher Power), we're on our own. We have to handle everything ourselves. We often worry a lot, because we’re not sure of what will come, and unsure of how to handle what already faces us.
When we surrender and ask God for guidance, and connect with Him all day long, then everything is easy. We look for answers from God, and we find them. We ask for help, and we get it.
How do you know when you're doing God's will? Simple, when you connect, and desire with the deepest part of your heart, and you surrender, then you are.
You know you're with God and doing His will, because everything just turns out well. Things synchronistically line up and work.