I did the Cabbage Soup Diet too. Actually, my mom made it for me, and as she's a very good cook, she "doctored" it a bit so it would taste better. Even so, it was pretty bad. That lasted about 2 days max. I had to defrost it and throw it out months later.

The Mayo Clinic Diet is also known as the Grapefruit Diet. That was relatively ok and I lost about 5kg on it. But I hate grapefruit!

Then the low calorie diets of my own invention: I had around 600 cals per day for about 2 weeks. I lost about 5 kg on that one. It worked in time for my Caribbean vacation, but I got it all back as soon as I got home. So much for that...besides, I wouldn't recommend starvation as a weight loss method. Tee, hee...(but I looked good in my bikini and that's all that mattered to me back then).

When I was a teen I did this diet (invented by yours truly):

Breakfast: 2 slices of white bread with strawberry jam .
Lunch: 2 boiled potatoes with loads of butter.
Supper: again 2 boiled potatoes with butter.
I lost quite a lot, but felt so weak...it was just a low cal diet, after all

I've been on too many diets to remember, but those are the ones that come to mind. LOL. Now I'm doing Neanderthin and losing weight healthily.