Personally, I love love love love loveeee to make connections between my life and my star sign (gemini!). Most people think I'm crazy because I have to believe the stars control who I am and who I'm going to be if I believe in star signs but that's not true at all. I definitely see the gemini traits reflected in my personality and you may see some of your own star sign traits peeking through, too.
But that doesn't excuse rude or inadequate behavior. Let me explain.
Don't fly off the handle and act like a child if something doesn't go your way and then say, "It's because I'm an Aries." Don't become extremely possessive in a situation that doesn't call for it just because "you're a Taurus." Shout out to all the Geminis out there, but don't be a two-faced person when you have people who are counting on you and care about you!
Don't blame your star sign for not being a decent human being.
With that being said, don't diminish your ability to do great things because of your star sign, either! Same set of analogies as before, here. Don't be too shy to say "hi" to your crush and blame it on your sign. Take a leadership role, even if your sign says you generally aren't a leader.
Define your star sign, don't let it define you.