Clean the air filter inside the air conditioner on a regular basis --- usually once a month will suffice. If you check the air conditioner's filter and see that it is dirty, you should clean it immediately. Dust and debris that build up on the filter make it harder for air to circulate inside the air conditioner. This causes the air conditioner's fan and other components to work extra hard to distribute cold air --- it also reduces the air conditioner's overall efficiency.
Adjust the settings on your air conditioner so the fan is on the desired level. Most air conditioner units have a knob that controls how much air is being blown out of the device. If the knob is turned down to a lower setting, the air conditioner will not produce as much cold air as you might like.
Choose the correct-size air conditioner to fit your living space. If you have an air conditioner that is too small for your living space, the fan will not be able to spread cool air to the entire area. A general rule is that you need 12,000 BTUs for every 500 square feet of space.
Place a stand-alone fan in front of the air conditioner, or within the room, or turn on your ceiling fan. This will help the small blower inside the air conditioner by distributing air to the far corners of a large room.