I do better working on several things at once because I get distracted by shiny things. Also, the variety is probably better for my shoulders and spine, which like to develop gordian knots at the drop of a hat.
That said: right now, I am tunnel-vision single focus, trying to get Kaya's habit done so I can have it anime-styled wearable for ALA in ... three days?
But once the dust settles after that and I've recovered, it'll be a juggling act between finishing (and blinging) Kaya, redoing parts of my Unohana cosplay, and trying to get my doomed Risai done for Sakuracon. Oh, and if there's time, touch-ups on my Miranda dress and starting the two Hagaren costumes I'm supposed to do for Fanime (Ed for my sister, Izumi for myself -- assuming I'm not dead sick of white twill by then). That'll be more like it -- yay, variety!