I often sway back and forth when standing up... although this is mostly because I hate standing up and quickly become tired. When I was a child I also used to 'knead' the ends of pillow cases, where there's lumps, as I enjoyed doing it for some reason.
To be honest I never heard/thought of the concept of stimming before reading about ASD-related things, and since it seems everyone can relate to it in one way or another I'm trying to see whether any of the things I did or still do could be considered as such.