I dont wanna start doing past papers now, i feel i need more practice because for the c1 exam in jan 2012 all i did was past papers and most of the exam wasnt based on past papers questions, now im stuck worrying about my c1 result 
Well if the exam is based on the syllabus, which is covered by the book with some examples and questions, past papers are there to help you practice what you understood and learnt.
You should not expect you get the same questions as the ones in past papers. Be confident of your knowledge of the whole material and
THEN go and solve past papers. (Hence past papers alone won't benefit you)
You need to pay attention as C1 is a piece of cake, if you did not do well in it you should work harder for C2
