Would you be an efficient personality and prepare now to get things together
Hmmm, sorry to split hairs - but preparing early might be good for exams, but preparing an away bag when you need most of the items up to the last minute may not be "efficient". Efficiency based on a time and motion study would probably involve putting the away bag at the centre of your room and throwing each item you will need into it when you pass the bag based on the fact the item will no longer be required at home.
I have a feeling your post is more about procrastination, in which case I can tell you I am a highly efficient procrastinator.