How frantic do you become when things don't go as you had planned? I'm not as laid back and roll with the flow as I'd like to be, but I don't go into crisis mode on a whim either. There is peace in knowing.....God knows my future already, God will provide for all my needs and God is in control, not me.
It's easier to say than actually do, but 'I won't freak out about what I can't control.' I don't believe we think we are strong enough to handle hardships alone but thankfully God can give us the strength that is sufficient for each day.
I, personally, know of things that lie ahead in my future that cause me fear and worry. I cannot dwell there or it will rob me of the joy of today. Blessed is the one who trusts in the Lord and so that will be my final answer to all of my doubts.