Worry feels productive, right? If we worry about every possible scenario, then when that situation happens, however unlikely it may be, we'll know what to do!
A wise woman once told me that worry is negative prayer. It's trying to wrest control of life away from God. Rather than letting go of stressful things, it's holding onto them, believing that they're best in our own hands. Worry is focusing on all the limitations, all the shortfalls, all the fears, rather than focusing our hearts on God's abundance, on his provision for us. God cares for the ravens, so they have food to eat. They still have to go and find it, but it's there. The same is true for us -- God cares for us. We still have to move, to work, to strive, but we are not forgotten by God.
So let your mind focus on the provision of God, rather than the things of fear. When you're anxious and worried, find a Psalm. Pray. Hand that over to God, and let your times of anxiety be transformed into leaning into the Lord.