The electricity the wind turbine produces must be stored in batteries. 

Let us for a minute compare electricity to water, where the wind mill is a water pump and the battery is a water tank, and the wind mill fills the tank with water. The bigger the tank the more water you can store and have to your disposal.

On days when the wind is not blowing and you are still using the water you can see if you don't have a big tank you are going to run out of water.

It is the same with electricity the more batteries you have the more power you have at your disposal.

To get back to your question of what you can do with the power you must first make a list of the things you will attach to your system, by recording the amount of watt each item consumes.

Anything that uses electricity! From the list you made may have included some of the following:

• 10 energy saving lights @13Watt	130 Watt
  1 computer	80 Watt
  1 television	250 Watt
  1 refrigerator (10 year old)	780 Watt
  When we add all this up we get:	1240 Watt

    From this we can calculate the amount and capacity of batteries that is able to store this power.

Battery capacity is measured in Amp/hrs, so to convert 1240Watt to Amps by dividing 1240 by 120volt and we get 10.3 Amps which means we need batteries that we can draw 10.3 Amps from per hour.

So let's say we buy 12, 8 volt 240 Amp/Hr deep cycle batteries and connect them in parallel. By calculating these numbers we find that we have power for 9 hours with no wind.