So after my rather sludgy first attempts, I have hit upon some excellent smoothies/snacks by using milk and frozen fruit and greens. It produced a creamy, soft serve ice cream texture. It was an especially big hit with the kids when I left out the greens. :)
I've been looking up recipes instead of using a shotgun approach, which consisted of putting everything I had in the fridge in the blender, and that's working out better too. I haven't been disciplined with the rest of my diet to have any weight loss, but my nutritional intake is way up, according to My Fitness Pal.