Liz Pulliam Weston has a great suggestion this week in her MSN money column: Pay Yourself $2 a Gallon. Everyone is saving money now that gasoline has come down in price, so she suggests putting the money no longer being used to drive, into savings.
I budget $80 every two weeks for gas. When gas was at its peak, that wasn't quite enough. But these days, I usally get by for $50 or less over 15 days.
I don't put the excess into savings, but each month, I take what is left in the envelope marked "gas money" and I snowflake it to my smallest debt.
My mortgage payment, which fluctuates due to the inclusion of insurance and property taxes, goes down $17 beginning in March. I'm planning to snowflake that one as well.