Getting outside and in almongst the plants and the sun and doing breathing exercises is a big help for me, but not always possible. Going over the facts about "right here, right now" in my head is starting to be a godsend, because I can do that to when I realise I'm slipping without anyone realising ("I am Ragdoll, I am 34 years old, I am sitting in a brown wicker chair on the patio of my apartment..." And on it goes).
Honestly though, being dissociated has been the "norm" my whole life, yeah? So realising when it's happening? I don't even know how I'd tell if I was space cadet a lot of the time because that is what my normal body/mind experience has always been like. How do you know that you're not seeing the colour green right now if you've been colour-blind your whole life?
Some of my older parts are connected enough that they know how to ground, just like me. But I think it's more often they decide they're done and retreat voluntarily if they've decided to take control completely.
And how do I know which one is me? :cautious: I take it as a given that I just "know". No master plan there, just rollin with it and hoping that I've got it right. I think Me is the one that operates most of the time, and is kind of like the muffin tray - I'm the one that holds all the other muffins together (that analogy makes sense in my head, which is good enough for me!!)