This thread is a great idea.
I am thankful for:
this forum, as you said. It's great to know that I'm not the only one whose sanity is questionable right now.
The people who wrote my letters of recommendation. They offered suggestions on where to apply, and wished me the best.
Seriously, I'm grateful for the research opportunities I've had that will help me get into grad school. I worked hard, but some of them were luck (since a lot of summer programs are crapshoots!).
Also as you said, the fact that my professors critiqued my SoP and CV a hundred thousand million times. Seriously, they probably put more time into that document than I did writing it!