For most of today I was in a crappy, crappy mood. I was tired, sad, unmotivated, and overwhelmed. I talked with my therapist about my work-related anxieties instead of my sister's death. I nearly fell asleep in lab meeting. I took a nap in my office. I tried to be produtive.
At the end of the day I went to check my department mailbox. What did I find? A HUGE chocolate bar with a thank you note from the classmate for whom I reviewed numerous NSF GRF application drafts. A huge bar of chocolate was exactly what I needed. That made my day.