If anyone has the audacity to try and sell you 'selective school' study tips, run - as fast as you can!
There are SO many reasources on here - state rankers guides for eng, maths, eco. There are threads discussing study tips, and youtube videos from medical students (shoutout Ali) who promote...
As for study techniques, this is also something you have to find out for yourself. Do some research, it really changed my grades once i flipped from that traditional way of studying. There are plenty of resources and videos out there, with sufficient scientific evidence that you'd be crazy not...