Before i get flamed, former racer just starting freestyle looking for some advice. Someone told me to just pop harder and that'll help me keep a more centered balance? I'm not really sure though. Thanks!
pop/set trick, do trick, spot landing, and then widen your feet before you land. also try to lift up your legs a little while in the air.. and try to have better hand placement.
i had the same troubles when i was learning 3's, a really simple way to land more forward is right when you take off from the lip, lean your body a little more forward then you usually would when skiing. that helped me a lot when i first learned them, but after a while it just becomes automatic.