Here is an excellent article written by Jeff Wagner titled "Distance Casting - Not just for show".
For people who never fish anywhere but small streams totally protected from the wind using small flies, then distance casting may not help them as much as someone like me who fishes everyplace there is water that likely holds fish of one kind or another.
This is not so much a "How To" article but a "Why To" article. I just had a friend leave who, unfortunately, blew out his casting arm and not his shorts trying to cast into a breeze.
This is the third time this has happened to different friends down here in three years, one recovering just enough with ice packs, heat and ibuphophen that he decided not to cancel his departing flight to Montana for trout. He spent two or three long days in the house, though, in pain, looking at the water and wishing he were fishing.
Those of you who think of distance casting as unrelated to actual fishing might want to read it.