Taking energy from the air. There is places and altitudes(high places), where wind is always, or most of the time, some places have wind not too often or rarely - but, you still can make energy, and accumulate it.
For beginning - you need any electricy generator. After we need to put to rotating part something as propeller, or as you see on the picture - four big palms. Horizontal wind generator is good that you don't need to rotate it to wind direction - it will work even if wind changes at 180 degree. I think it is good to be independent, and energy is the first thing to achieve it.
Whom interesting from where to start, watch/look at the links below - how to make a generators: