Here's what I find myself doing now, every time I fill up with gas lately: I will stand there a full 30 seconds after the pump shuts off, trying to get every last little drop. I'll shake it a little. Wait a little more. A little tap or two, and another tiny, precious drop! No way I'm leaving that in there for the next guy!
Back in the wild, carefree days of $3.00 gas, it was nothing like that! Heck I'd spray a couple gallons on the ground just cause I liked the pretty colors!