Drive less aggressively, use the brakes less, keep steady speed without accelerating fast/frequently.
The Toyota Prius gets 51 mpg highway 48 mpg city.
Just looking at the 2012 models the winners are: Toyota Prius - 50 MPG Honda Civic HYBRID - 44 MPG Lexus CT 200h - 42 MPG Toyota Prius v - 42 MPG Lincoln MKZ HYBRID FWD - 39 MPG Ford Fusion HYBRID FWD - 39 MPG
The EPA mileage estimate for the 2014 Toyota Camry-Hybrid is 43 mpg in the city, 39 mpg on the highway.
The EPA mileage estimate for the 2014 Toyota Highlander-Hybrid is 27 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2006 Toyota Highlander-Hybrid is 28 mpg in the city, 25 mpg on the highway.
The EPA mileage estimate for the 2011 Toyota Highlander-Hybrid is 28 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2008 Toyota Camry-Hybrid is 33 mpg in the city, 34 mpg on the highway.
The EPA mileage estimate for the 2010 Toyota Camry-Hybrid is 33 mpg in the city, 34 mpg on the highway.
The EPA mileage estimate for the 2010 Toyota Highlander-Hybrid is 27 mpg in the city, 25 mpg on the highway.
The EPA mileage estimate for the 2009 Toyota Highlander-Hybrid is 27 mpg in the city, 25 mpg on the highway.
The EPA mileage estimate for the 2013 Toyota Camry-Hybrid is 43 mpg in the city, 39 mpg on the highway.
The EPA mileage estimate for the 2007 Toyota Highlander-Hybrid is 28 mpg in the city, 25 mpg on the highway.