Save the Earth

After the Earth Hour Day, I am thinking ways to save the earth.
What I can do???

I think I can save the earth by...

>> using recycling shopping bag
>> using container to store foods
>> no air-cond if weather is cooling
>> no wasting of electricity
>> car pool with friends
>> plant more plants
>> buy necessities
>> cut usage of tissue papers
>> use recycle papers
>> throw wastes to recycle bins
>> help to run recycle activites
>> ....

What else can I do? keep on thinking and thinking...