It has come to my attention that I probably shouldn't have a "favorite" nursing tank top. Anything related to nursing implies that it will immediately be covered in breast milk in pre-digested and post-digested forms.
In general, I think the most depressing day of the week is always the day after I do laundry. For a few hours, everything is clean, and cute, and folded. The first few things to get "decorated" after the wash gets done always make me sad that I can't keep the world in order. After a day or so, it's all covered with spit up and poop, and I stop caring, and it's mostly fine.