Although I've done this less than I should have, writing out my thoughts, feelings, fears, and anxieties can be very cathartic (as can writing out my joys and gratitude). There's something about writing things out that helps purge the negativity from within.
I also have a very supportive family and online group that encourage me to always return to my faith. When things get really difficult, it can be easy to fall down, and it's such a blessing to have people surrounding you that will help pick you back up and remind you that you have a God that loves you unconditionally.
Honestly, when my pain is high and my fatigue is even higher, I have a difficult time holding onto hope on my own. I depend on others for prayer and support... much more than I'd like to (I've never been good at needing to depend on others). Thankfully, I have a handful of people in my life that are willing to pray and hold on to hope for me, when I cannot do it myself. I'm forever grateful for these individuals!
By the way, this song is a good reminder, too...