how to play at wing.

to play at wing in rugby ideally you should be very quick, it also helps to be powerful and have good balance.
You should know skills such as handing off and side stepping and be able to use them well.
Not only does it help to be quick as a winger but having a good change of pace (quick acceleration) is important.
A good thing to note is that not all winger are the same, take for example Jonah lomu (in the picture below)
hes strong, powerful, fast and has great balance and he tends to run over players more than he avoids them.
Then there Shane Williams who's small, fast and evasive e.g. tends to avoid contact.
Now these are two extremes of great wingers, but you can see from them how you could play as a winger.



General:
A lot of being a winger is simply being very athletic, you should look at area's where you could improve for example your speed, your fitness or your strength and power.
You've also got to have skills such as sidestepping, it was a major part of Shaun Williams game and should be a big part of any wingers game.
You should also be able to use your hand off, Jonah Lomu loved this and was a great asset to him
this video shows Lomu's strength.

Shows Lomu's pace and power.

And then there's more basic skills such as passing and catching, these are just as important! and its not just catching from a pass you'll need to catch kicks as well, so make sure you practice this

Basic play:
Often as winger you don't do a lot untill the ball actually gets to you, but there's subtle thing's such as if your blind side and you think there going to kick, probably because there under pressure in there 22, then you need to stand a bit further back and always be ready to run back and support your fullback.
Another thing, when the ball comes out wide but doesn't quite get to you and your player gets tackled then sometimes your forwards won't be able to get there quick enough so you need to get in the ruck your self, if you need help with rucking, some of the stuff in my rucking guide might help you.

Getting faster:

Now there's many plans and program's out there you can follow to help you sprint faster but i'll give you some tips and exercises that i know to help you out.
A great type of exercise for speed is plyometric's, plyometric's is high intensity and explosive movements.
Examples of plyometric exercise's are jumping lunge's this is where you do a lunge, say with your right foot in front, then jump in the air and land in a lunge with your left foot in front; do this continually for a certain number or reps.
Another plyometric exercise is tuck jumps where you jump in the air as high as you can and bring your knee's in to your stomach, once again do this continually for as many reps as you can take.
With plyometric's make sure you have a soft surface to land on as to not injure your self and you should have long rest in between sets.
Another thing you can do is sprinting, funnily enough this is the best way to get faster; keep in mind in rugby you usually won't run more than 20 meter's or so, there's no point running 100 meter's then its best to do 50 meter or less sprints, you could do something like 5 50 meter sprints then 4 40 meters 3 30 meters and so on.
Its really up to you to get a routine that works for you.

How to sidestep:
To sidestep you need to trick your opponent to think your going in one direction and then go the other, the two main parts of sidestepping are change of pace, so you can get past him before he can readjust himself and then there's timing, and that's something you can't be taught, its either natural or learnt through experience.
All there is really to teach about the sidestep is that you need to put all your weight on one leg so it seems like your going in that direction and quickly shift your weight to your other leg, but like i said its really all to do with  timing, if you time it wrong all your going to do is run right into the player that's going to tackle you.
This is just a very brief overview of the intricate skill of sidestepping if you want to learn more from an experienced guy visit this site- http://www.rugby-sidestep-central.com/index.html

If you want to see visually how to sidestep just check out the video of Shane Williams.