The changes in oil prices, particularly of late, are driven by speculation and not by supply/demand. The changes in gas prices are primarily driven by the changes in oil prices. The caveat, of course, is that the gas price passed onto the consumer is a weak function of supply/demand.
There are varying economic stances on how supply/demand relates. Some believe that decreased demand will lower prices, but I believe it would have to be a significantly lower demand. I believe a decrease in demand would only result in an increased price for those who absolutely must have the supply, which is a large percentage of the developed world, who also happen to be the wealthiest. Increasing the supply may work, but I don't think the oil market is prepared for an increase in production that would be drastic enough to offset the cost of long-term speculation.
The only way that you can avoid paying ridiculous sums of money to use oil is to stop using it, and that is one hell of a tough feat. I suppose one could insert some form of regulation, and I am usually quite opposed to such intervention, but I doubt the market will correct itself before we have moved on to alternative sources.