You know how sometimes you're trying to learn something and you're just not getting it… then one day someone describes it in a different way, or uses a different word, and suddenly it all makes sense? That's what happened when I switched voice teachers a year ago… my current teacher had a different way of describing what I needed to do and suddenly it just clicked. I made a huge leap in my singing ability based on that… and while I've slowly continued to improve and refine my singing, I don't feel like I've made any huge leaps since then.
Then at my last lesson, we were doing vocal warm-ups at some lower notes and she said, "Think of sucking your voice up." I had been thinking along the lines of throwing it out between my eyes, focusing over my nose, or up and over inside my mouth and face. When she said to suck it up, I thought of trying to suck it into my skull. Of using my brain to pull it up there. That one word somehow made something click, and I was suddenly able to keep my voice up on top of the air at a note that I had struggled with before.
So off I go now, to suck it up.