My only advice::: You still have more than a month left, so give up on all the things you do just for fun or time pass, and study hard, especially over the weekends. If you really start studying, you will realize how slow time moves, and how so much time you actually have. I take education very seriously, so I almost always give first priority for it, giving up on many things for the time being. When I was in High school, I even used to go to cram schools, which churned the life out of me, but it's all worth it.. So, discipline yourself, make yourself a time-table to follow, and work towards it. Just keep distractions off distance.