I actually score all sorts of different goals. In PES 2011 offline it was mostly out to wings-Low/Near post cross-Header/Volley.
But in PES 2012, I mix up my play. Usually hold on to the ball in a heavy possession game, and look for gaps whether it's on the wings or down the middle. I find if I can keep hold of the ball and quickly move it from left to right and vice-versa, I can pull holes in the defence, create gaps for forwards to run into and exploit.
I never thought I'd be using the right stick to get players to make off the ball runs, but it seems a necessity to create enough chances to will games consistently. Plus I need to score a lot as I still suck balls at defending, but I am getting better at it.
As for long rangers which a lot of people have put, as I'm using the default ML team (Ruskin, Jaric, Stein etc....) If I try these they are more often than not going well wide or the keeper catches them.
Shooting a find a bit weird, most of my shots seem to go down the middle, which can be a bit frustrating when in 1-on-1s, I hear if you use the right trigger while shooting you can change the direction of the shot, but I haven't seen much evidence of this, but I might be just doing it wrong. When I'm in a good position to score I don't really want to be thinking about holding another button before I shoot, let's face it, a lot of chances I have, I only have a split second to get a shot away anyway.