How do you keep Windows running smoothly over time?

Hi all,
I’ve noticed that Windows 10/11 systems tend to slow down after months of regular use, even on decent hardware. I try to manage startup apps, keep drivers updated, and clear temporary files, but I’m curious what other strategies professionals use to maintain performance over the long term.
Do you focus more on system cleanup, optimizing settings, or regular monitoring of background processes? Any tips or tools you swear by would be really helpful!