Here in Austin, I just take it to the hazardous materials thing, toss it on the cart, and be done with it. It is a thought to toss it in a firepit, then toss a match into that... but gasoline vapors can easily flashover, and spring's fashions are not third degree burns and toasted eyebrows.
If the gas is on the border of going bad (6-12 months), I mix a little bit of it with a full tank of fresh gas, toss some Star-Tron in, then let it burn through my truck. My truck has the old 5.4L engine, and can take marginal fuel without too much issues.
If the gas is obviously sludge or otherwise just unusable, it goes to the hazardous waste facility.