I think Raleigh199 is definitely correct.
At the moment, I just strggle hard to get my highest possible mark in order to secure an interview chance of the great companies. Afterwards, I will throw away the garbage that I learnt as the knowledge itself does not help my career and life at all. The purpose of PRing and learning is to be able apply the knowledge to our life and to get some new insights which are helpful. Guy, if you aim at 100% only, don't do PR but just do past papers. A-Level repeats past papers and it is dead easy to get As. You don't even need 100%, you only need 80%.