What's a habit you picked up that quietly changed your life?

Not looking for the usual "I started going to the gym" answers. More curious about the small, almost boring stuff that ended up making a real difference over time. Could be a morning routine, how you manage your phone use, whatever. What's something you do now that you can't imagine dropping?

For me, I started avoiding screen time around 30 minutes before bed. I no longer sit in bed scrolling, I plug my phone to charge and either read or listen to music to go to sleep. It has helped a lot, I've noticed my sleep has improved and I'm able to give my brain and eyes more of a rest instead of doom scrolling.