Let us all think in English !!!!!

Hello everyone!
Well, I try to learn English by reading magazines of all types and watch movies and programs in general. I also like listening to music preference PopRock (U2, Led Zeppelin, etc).
My big difficulty is that when I speak English, I think first in Portuguese and then speak English. This makes my talk slower. I think increasing my vocabulary this problem diminishes. So I suggest that during the class activities to strengthen quite the vocabulary.
"UM BORA BAÊAAAAAAAAAAA!!"
Greetings.
Rafael Martins