Tonight I shook my yoga routine up with some warrior lunges; this move starts with warrior two, but instead of the static lunge one lunges with the knee over the toe without holding, then straight again. Instead of the static lunge that is held for ten breaths, do ten lunges then switch.
It's a little hard on the knees, but I felt the workout in my quads where I don't generally feel the static lunge right away. Perhaps I'm not doing it right, but I like the repetitive lunges better.
I also threw in some chair poses for good measure. Also a little painful across the top of the knee and my ankles were starting to hurt after just a few breaths, but I like feeling the muscle tighten.
I've also been doing this ab workout. I'm sure I look a lot less graceful than the ladies in the video (especially the one in pink, I want her for my instructor) but I'm working on it.