"If you can speak then you can sell anything."
I had found that the Kathmandu toast masters club was very nice place to go and learn/improve the English.
The main theme was
LOVE: Learn from other's Valuable experiences.
Kalpana DD was the inspiring figure in Kathmandu toast master. She so bright that she leaded the Nepali team in Special Olympics in 2003.
http://www.aresearchguide.com/3tips.html (better tips)
http://artofspeaking.org/blog/?p=13#more-13 (I don't know, but feel that will be worth looking!)