|I'm seeking advice on how to prepare to become a Royal Marine Commando Officer. I'm currently 16 and have got 10 GCSE's, not in bad physical shape and am a member of my school's CCF so tactically aware. Would just like to know what I should be concentrating on and how best to prepare for it e.g. specific exercises etc and general tips and pointers. I'm not new to military principles as both my parents have been in the Army and the military runs quite deep through my father's side.