FEAR itself...is the thing I struggle the most with.
Mostly my fear is losing loved ones... my husband, our future children, family members, close friends. I fear tragedy, cancer, disease, disability... all that horrible stuff.
I am working on this by trusting that God has our days numbered and nothing can or will change that... so when/how he wants to take us, it won't be an accident, it will be His perfect plan for our life. (But sometimes hard to get that message to trickle down from my brain into my heart!)
Beth Moore once said something along the lines of... Imagine your very worst nightmare. You worry about it day and night for your whole life. She said MOST LIKELY, chances are...it won't happen. Do you want to be 98 years old before you realize you have wasted a whole lot of "life" by living in fear and captivity? So I am currently working on breaking free from this so that I can live a full life of freedom.
Some verses that help me:
Phil. 4:6 Do not be anxious about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God.
2 Tim. 1:7 For God did not give us a spirit of timidity, but a spirit of power, of love and of self-discipline.
Rom. 8:31 What, then, shall we say in response to this? If God is for us, who can be against us?
John 14:27 Peace I leave with you; my peace I give you. I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid.