Instead of driving at a steady speed with whatever gas pedal presure is required, you routinely release the gas pedal and coast for a couple of seconds to allow the ICE to shutdown, then gently reapply gas pedal presure in an attempt to continue to move the car forward on battery alone. This sometimes requires allowing the car is slowly lose a bit of speed to avoid an ICE restart. This action will cause the car to run on battery alone more often than if you simply maintain constant pedal pressure and speed.

Two climate control systems, one inside and the other at the tailpipe.

2007 Camry Hybrid (in service June 2006)
FE: 6.77L/100km (34.8 mpg) over 37750km (23450mi)
75% city - Ave trip 20 min - 2 Winters