Only a few months ago, I paid $1.87 a gallon for gas in Thornton, Colorado. That’s more than a dollar cheaper than I paid this past week at the same location—$3.05 per gallon! What’s going on? According to Forbes, the price for a barrel of West Texas Intermediate crude oil tested the $70 level earlier this month, before closing at $69.62. That may be great news for oil producers around the U.S., but it’s bad for America’s families getting ready to hit the road for summer vacations. And sadly, I have even worse news for travelers. Given industry predictions and what’s coming out of Washington these days, the price at the pump won’t be going anywhere but up in the foreseeable future. While there’s precious little any one of us can do about the national economy, we can do something about our personal economies. To save a gallon of gas, …