[edited to correct the misspelled the word 'hair']
Due to the pandemic lockdowns, many people have much longer hair than before. If you want to get back to normal or just want to change your looks, consider donating your hair to make whips (usually for people with cancer, normally children), which are otherwise quite expensive.
Just search in the internet what is the easiest procedure where you live. I did it twice: the first time I had to send my hair by post to some organisation, and the second time I happened to live close by a hair dresser that collaborates with another organisation, so I just needed to go there to get my hair cut and they took care of everything.
The "conditions" vary from organisation to organisation, but obviously your hair has to be long enough to be able to donate it (count on at least ~20cm after being cut), and they usually prefer hair that has never been coloured.
It is a pity I haven't thought on writing this post before, but there is still a significant amount of people that may be interested.
If you also did it already, it would be interesting to see your experience in the comments. For me, it was always super easy —therefore, effective— and rewarding.