When I do online with my girl, I try to either call or stick around on the computer for a while afterward to make sure that she's okay emotionally and feeling loved. I haven't really done online as a submissive, but I think I would probably want to have a cup of tea and snuggle with one of my stuffed animals* afterwards, and take care of any spots that might need ice or heat or band-aids.

* so glad my sub isn't reading this.