Thanks so much for the contributions guys / girls, enjoying reading them.
On a personal note, have only lost another 2-3 pounds, but am enjoying exercise now more than I have in ages. Variation has definitely been the key to that. I did wonder if I was making a costly mistake by doing yoga and tai chi at home to a DVD rather than under the supervision of an instructor (ie risk of injury) but so far so good.
Have now used up (+ ditched) all health supplements now. Going totally with my blender and nutrition.
Glad I bought the kettlebell. Thankfully it wasn't a five-minute wonder and is not now gathering dust, pretty enjoyable to do, and arms definitely feel a bit more toned for a start.