Yesterday, gasoline was $4.08 9/10.  So I bought 2 gallons of milk and got a coupon good for $.10 off each gallon of gas.

The question was:  Do I wait until Friday to fill up (after I've used a little more gas and buy more with the coupon?  Or buy it on Thursday, knowing what the price was then?

Buy a little less now?  Or risk the price going up?

So I filled up yesterday and today gas is $4.19.

I "won" $0.11 a gallon!  Over a dollar!  Okay...maybe not so much.  But maybe it's the thrill of the chase.