buy some gloves, an overcoat, and a hat......you will get cold on the wing in Scotland....the ball never gets to the wing as by the time it does it's frozen (see the international team to see it never gets out there
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On a more serious note get some brain cells, you have to be able to think quickly as a winger, and forwards don't tend to....they just like bashing people
When on the wing "look for work" if something is "on" get involved, George North is good at switching wings...coming into the centre, taking a short ball at pace, the best wingers in the game are ones that work, not ones that wait.
One skill I think wingers don't do as much as I would like is having the confidence to kick in field when they are being forced to the touch line, being able to "grubber" a kick in field a short distance so it is bouncing around makes it hard to defend, also a "chip" over the top is also a useful skill not used enough, many go for the touch, but I like to play rugby not watch forwards throw the ball in, maul/fight/smash each other.
Running with the ball in both hands is difficult, throwing a dummy to the touch line can confuse and make a defender fall for it (especially if it's a fat forward having a rest on the wing), be prepared to dive early for the try line especially when wet it is harder to force you into touch if your at full pelt diving for the line 5-6m out using the (never dry) pitches in Scotland to help you over
You have to be able to catch wild passes often behind you at knee level to be a good winger, having frozen hands will not be an excuse when you drop it
Have fun most of all, rugby is a simple game with difficult laws, don't over complicate it.