When life hits you in the face and you don't know if you can take any more, do you know what you can do? You can praise the Lord. The Lord loves you; this is true no matter what. Worship the Lord when life sucks. Give thanks in all circumstances, for this is God's will for you in Christ Jesus (1 Thessalonians 5:18).
Praying this psalm in your own words is a good way to start. List your fears, your wounds, and your struggles. Then, instead of spiraling into self-pity, rejoice in God's salvation.
“In this world you will have trouble. But take heart! I have overcome the world.” -Jesus (John 16:33)