That's a thirsty one. Unfortunately, there's no magic bullet. The biggest improvements are likely to be made from gentle driving - very gentle acceleration and little braking - anticipate light changes and coast to stops. You can use hypermiling driving techniques with any vehicle and get results. These really suck down the fuel over 65 mph, so keep speed lower.
Of course, making sure its tuned + fresh filters, energy conserving oil, and proper tire pressures are all necessary. If you're lucky enough to be located where pure gas is still sold, use it for better economy than the lousy E10 most of us have to use.
When its time to replace tires, consider rolling resistance as a factor (if you don't need the aggressive tread designs).