This verse gives us two practices that help determine the Lord’s will.  

First: worship. Worship is not for God’s benefit… He knows how good and powerful He is. Instead, it is for our benefit! We easily forget how good and powerful God is; thus, we often forget who God is. If we don’t know who our God is, how can we discern His will for our lives? 

Second: fast. When we think of fasting, we often think of fasting from food, but that is not the only item that we can fast from. Are you trying to discern the Lord’s will for your life? Have you tried fasting from the item that distracts you most from the Lord?