You should admit to yourself (and God) that you can’t make the right decisions without His help. And then ask God to give you wisdom and guide your heart (throughout the day) as you make choices. Always remember — you have not, because you ask not.
(James 1:5) If you want to know what God wants you to do, ask him, and he will gladly tell you, for he is always ready to give a bountiful supply of wisdom to all who ask him; he will not resent it.
The Bible, Simplified