When you change your mind's focus from you and your situation, to those around you and improving their situation you become an emmisary of generosity and loving-kindness.
These traits send "what's-gonna-be?" questions out the door. Now, your mind space is reserved for things that help — thoughts that lead to action.
Show your Brain who is boss. You are more than just a brain.
You are first and foremost a pure spiritual being, created
by God. Your spiritual self resides in your body for the duration of your time in this world, to use your physical body for spiritual, meta-physical ends.
To the body, "Brain" is the part of us that processes nerve signals, has memory banks and helps us navigate our physicality. Brain is central to the body, but is only one element of a faith-based life, for the brain can only grasp what it can experience. Faith is on a different plane of existence.
The well known verse in parshat Shoftim "Tamim Tihiyeh im Hashem Elokecha" tells us to be of pure, perfect faith with God. Rashi tells us it means living life as God presents it to us and not making inquiries into what the future holds.
So, shift those troubling thoughts aside, and replace them with great deeds, making your corner of the world a better place bit by bit. Everyone can do this. No cost. It's not the money you invest in your deeds — it's the heart. God wants your heart.
How much "heart" can you offer back to God this year?
Try 1% more than last year — that's a huge amount of personal change, since your heartfelt prayers now have a deeper, outwardly-focussed direction.
Future knowledge is in God's realm.
Great Jewish Deeds are up to us.