I had a bad habit of accumulating stuff that had some abstract value (may come in handy in the future, is a good deal, etc), and letting go of a lot of it was hard in part because of guilt surrounding environmentalism. Even something that I had no attachment to whatsoever felt extremely difficult to get rid of because it needed to be disposed of ethically. The idea "you can't save the rainforest if you're depressed"[0] was helpful to me in breaking out of this mentality.

[0]: https://www.strugglecare.com/struggle-care#:~:text=You%20Can...