Healdem in on the right track. Run the tallest gearing you can live with and get rid of as much crap as you can - less weight allows the engine to works less to keep you going. An aftermarket pipe would probably cut 5-10 lbs of total weight. Adding a power commander would allow you to fine tune the fuel map. The problem is that most custom maps were designed to give you more power, not better mileage. The FI is lean as it comes from the factory, but could be optimized for fuel consumption by a good tuner.
Run the highest possible pressure in your tires (but no higher than max inflation pressure listed on the tire). Higher pressure gives you lower rolling resistance, but it will reduce grip, so keep that in mind until you get used to the changes.
Avoid barn-door like windshields, they cause too much drag. The OEM is not bad, but I think something a bit bigger could have an advantage if it reduces the air pressure on you.
And of course, nothing really matters if you don't help the bike get good mileage. As healdem points out, if you are smooth, resist the urge to accelerate harder than necessary, avoid starting and stopping (or even accelerating and decelerating) as much as possible and braking less by looking far ahead and adjusting your speed when you are in traffic it will all get you better mileage.
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