How many times do you need to put a $100 dollar bill in your gas tank before thinking about the alternatives? CNG, compressed natural gas, is something to consider if you drive a lot because CNG will burn in your engine just like gasoline and you can fill up with your usual tank of regular when natural gas isn't available.
T. Boone Pickens, famous as an oil man, has presented a plan to build a lot of wind farms in the central U.S. to take advantage of the wind there. The electricity thus produced can be used to replace a portion of our electrical power generation, roughly the amount produced by natural gas, and the natural gas thus freed can then be used for transportation, like in your truck, for instance.
Natural gas is already used in lots of trucks and buses and cars like the Honda Civic GX. It's clean burning and there's a lot of it in the U.S. plus the price is lower than gasoline, ... a lot lower. Buying a CNG vehicle brand new is one option but converting existing gasoline vehicles is what makes this fuel so appealing, you still have a gasoline powered truck but you can also use CNG as long as you have a filling station available. If you have natural gas at home, you can install a pump and refill your truck right there.
Conversion kits are available to make your truck an NGV, a natural gas vehicle, and no, they're not cheap, but again, how many $100 dollar bills do you want to put in your tank before trying to cut back on the financial bleeding? You install high pressure cylinders to hold the CNG, the proper fuel delivery equipment to inject the gas into your engine and there's a switch to use gasoline or CNG depending on which tank is full.
The PickensPlan isn't necessary for you to do something right now but it could be something to help all of us over the near future. Sounds like a plan to me.