Shadow Boxing

Hey guys, I haven't really ever sparred in a boxing ring before, but all I have done my life is shadow boxed, and I feel like if I were to get into a REAL fight with someone who knows a little something, I wouldn't do so well. On the other hand I feel like I've mastered my combos and some what my stability on my legs. Any help with this? Anything I should practice to help ready myself for a real fight?

PS: I've already been in a couple where I just ended up hitting the person and it was over, but I am curious about getting into it with someone.