What to do after 12th?

I am a student of class 11th & i want become an IAS Officer. I've taken science (physics, chemistry, maths, english and commercial arts). can any1 suggest me wat to do after 12th as graduation? something that would help me prepare for IAS n will also be a good career option in case i can't get into IAS. plz suggest me sumthing interesting other than architecture and engineering.