I don't know how you do it, Myr. I have three major stories I'd like to be working on but I've learnt that I'm most definitely a 'one story at a time' writer, and trying more than one just doesn't work for me.
I do reasonably well with managing a couple of hours writing on most days (no comparison with younger authors who have to work though - retirement does have benefits. )
My writing presence on GA is sadly lacking at the moment but my plans are to change that in a few months time when I'm hoping to start posting my first attempt at the fantasy genre.
It's set in Australia as well as elven realms, with magic and adventures. It's already reached novel length and is still growing in scope and complexity.
Thank goodness I decided (for the first time) not to post as I was writing, as the number of revisions and rewrites of earlier parts would have driven readers crazy.
I see many GA authors with multiple stories on the go and wonder how they manage the mind shift required .