8. Allen Carr's Easyway To Stop Smoking

How it works: The late Briton's method involves clinic sessions which focus on why smokers continue to smoke and help remove smokers' fears about quitting through psychotherapy and hypnotherapy.

Conducted by a trained therapist, the first session lasts six hours and participants are encouraged to take regular smoke breaks. The session climaxes with the group smoking a final cigarette before throwing their cigarettes and lighters away.

Ms Pam Oei, 37, an actress and an Allen Carr's Easyway therapist, said that 80 per cent of participants quit smoking after attending one session.

Three sessions with Ms Oei cost $599 and she offers a three-month money-back guarantee.

Success rate: Ms Oei said she has helped 200 smokers quit since last year and the success rate is more than 90 per cent. Doctors did not comment on this.

This article was first published in Mind Your Body, The Straits Times.