don't know what to do

When i got back my exam results, only then i realised how much i neglected my studies for other stuff. Even right now, i am still struggling to come out with a plan to revive my faltering results, knowing very well i am not very disciplined anymore. With other obligations to look to such as prefect, robotics, interact, st. john, church, sports, family etc etc, i seriously dun noe how to correctly juggle them in one go.