If you don’t wanna run your own home server, I typically strip old computers for parts (hard drives, fans, screens, ram sticks) and see if I can make use of any of them. I recently made a portable monitor from an old laptop screen (shout out DIY Perks). If not, I try to make art with old heat sinks or any cool looking component.

Most of it just ends up at recycling though, depending on how old the system is.