I'm taking the Panhellenic Exams (more info here: http://www.networkfoundation.gr/academic/index.asp?thesection=index&thelanguage=1&thetitle=Academic&thenum=0&mcat=58&subcat=221) in about 6-7 months. My subjects are Math, Physics, Chemistry and greek language. I understand the material, but I have terrible study habits which can be critical for scoring high in these exams. For example, I dislike chem and I always skip it to study math or physics. It's like I don't have enough patience. What should I do?