The last paragraph from Wader is particularly good advice.
Although I passed OASC without drama, scoring well and getting all the right ticks in the boxes, one comment from my interview was that I could have taken a greater part in 'wider community activities'.
It seems like a pain in the backside but whatever you can get involved in, withou stretching yourself too far, will help you to stand out and if you have weaker areas could carry you accross the go/no-go line.