Tips on saving gas

Save on gas
More MPG
less gas
more miles
cheap gas
there are many more ways to to say it.
These are my tips on saving gas...some are easy, some are quite extreme.  I've been reading about how to save gas and was obsessed for a while and I will be passing on my knowledge to you now :)

Some Easy Ways

1. Lighten the Load - You know the stack of books that you've been carrying in your car...take it out.  The more weight your car has to carry, the more gas it uses.  Look through your trunk and the back seat of your car.  Those empty bottles, that half full bottle of coke, that box full of random stuff...take it out!
2. Fill up those tires when you fill up your gas - When you go and fill up for gas, pump those tires full of air (read the max PSI first).  Guess what, air is free in CA (I'm sure other states are free as well).  All you need to do is see the attendant and ask him/her to turn on the air.  Feeling lazy? When you go in for an oil change, ask your friendly mechanic to fill up your tires.  Most places will do so out of courtesy.
3. Ease off the gas pedal - Are you blazing down the freeway at 80+ miles an hour?  Slow down...stop slurping up gas.  Driving 60 mph is much more economical than 80 mph.  I read somewhere that each mile you drive over 60 mph decreases your fuel efficiency by 1% each mile over.  You'll not only save money on gas, but also decrease your chances on getting a hefty priced ticket for speeding.
4. Speed racer status off - When you see that red light turn green, slowly accelerate, don't step on your gas pedal full blast.  Doing so will save you lots of gas.
5. A/C off, windows up - Ideally your A/C off and Windows Up will save you gas.  If possible, windows down over A/C if you are driving local, if you drive 50 mph or more, A/C on over windows down, if you need to.  Locally, windows down will save you more gas if you want to cool down.  If you drive faster than 50 mph, then turn on the A/C and close your windows.  The wind drag of having your windows down is more costly than closing them and turning on your A/C.
6. Don't Idle - Do you warm up your car in the morning.  Guess what? Most new cars do not need to be warmed up.  Just keep it easy for the car in the morning.  Don't overwork your car in the morning.  You waste more gas idling (after all you are going 0 miles per hour/gallon). [I also read that it is a myth that starting your car takes a lot more gas than idling - your car uses about the same amount of gas as when your car is idling for 10 seconds] So, if you are at a drive thru, or that train track with the train, turn off your engine.  But don't do so at red lights...what if your car decides to die on you :P
7. Avoid rough terrain - When you are driving down the highway and you see bumps in the road, or dips, or holes, potholes, etc...avoid them.  Driving on smooth terrain will save you some gas (less resistance).
8. Level one - If you do decide to turn on the heater/air conditioner, leave it on the lowest setting.  The higher you set that thing, the more gas it will eat.

Some Difficult over the top ways

1. Neutral - Yup...you know the downhill area...yeah, neutral your way down the hill.
2. Once in motion, always in motion - This is hard.  Try not to brake! Think about trying to move a boulder.  If it was in motion, would it be easier to keep pushing it.  Now imagine the boulder and it was at a complete stop.  Think how hard it would be to try to move it...but once it is moving it's easy to move.  Same concept with the car.  The car uses more gas to go from a complete stop rather than a rolling one.  So if you see the car ahead of you is slowing down, you should have already eased off the gas and coast (or neutral).  Also, if you see that the next traffic light is red, again, ease off the gas pedal and coast.  Hopefully it will turn green and you can continue on your way...if you stop...meh... a little gas wasted.
3. Neutral out of your parking spot - Yes, like pushing your car when there is no gas.  You push your way out and in your parking spot.  Over the top? Yes! but it does save some drops of gas.  WARNING: This method does not activate your power steering or power braking.  You may lose control of your car so beware.
4.   Drive behind a truck - WARNING: Dangerous.  Driving behind a truck will put you in his blind spot.  Not only that, but you are also pretty blind behind the truck.  You will have less drag and will save gas, but you are also jeopardizing your safety.

If I am missing something, I'll edit.  If you have more ideas, shoot a comment!