Well, sometimes the darkness is thick, and we have to strain even to see the light in the world around us and in the close confines in our everyday life. It's those times that we need to CHOOSE to see it. To give God thanks on purpose, even if it hurts.
I hope that as I add to the list, this spirit of thanksgiving will be contagious, and your mind will be enlivened to the things around you that have worth- that are a gift to you from God-- even where you are right now! I guarantee you- there is something to give God thanks for.