Focus on clearing the exam. Study with that intent. Calm yourself at times of stress, tell yourself how easily studying comes to you. Focus on your strengths, identify weak areas and tell yourself how easy it is to convert these into strengths.
I myself have just written a tough competitive exam. My focus was entirely on my strengths, and as a result, a large number of questions in the exam were from areas I was strong in.
Go ahead and attract! You're through already!