IDSI is a underpowered car to be very frank. (its fairly complex engine built for econony)
u have to push it to keep it moving. i am not sure if the hypermiling concepts will even work on it.
talking about driving habits, i am in the fast lane always 10+ on the speed limit. if speed limit it 100, i am on 110
memon bhai, i have restricted the gas flow to get more mileage. power and economy hardly exist together in the real world