Ah, so the Aurashade is a master of the boomerang? Teach us the ways, oh mighty boomerang warrior. I is eager to learn.
ahaha, I'll take that as a serious question and actually tell you something useful-I'll relate this to art as well (learning more is always good). I've been playing the smash bros. series for 8 years straight, like religiously I play it a lot. A few things you need to know of how to not only improve your GB tactics but your Link overall:
-Practice practice practice (I can't stress this enough now with online play, you now have no reason not to improve)
-Like in art (I'm an animator, so it applies) you have to always be trying your hardest, always pushing yourself to the limit in skill and work ethic, same goes for this game. You must always be open-minded (its odd coming from me, as most of you know me as the god-troll of the link boards, you know, me shutting down odd moves and such. But while being open-minded, you must also be logical, and know your area of skill well enough to interpret new moves and ideas).
-Last but not least (and I hope you've read all this useful stuff) the GB works as a mindgame in itself, being that no other character in the game has that sort of weapon, you must use, **** and over implement it to your advantage (but don't be predictable!). I play the GB as another form of link, mainly speaking, it will almost always be flying somewhere, even if to occupy space. The trick is to aim it either at the ground if they seem to predict it coming, or throw it into the air (to again, occupy space where you opponent would've gone) just to set up a dome of projectiles around your opponent, thus limiting various escape routs.
tl'dr well if you didn't read it all then **** you.