Tagging an additional choose is always beneficial, but which one is the question. You have to choose the right course inorder to make use it.
Several institutes these days are offering vocational courses in all the major places all over the country.
How do you choose is, if you are a student belonging to the medical background or a science field, then prefer a course that helps in enhancing your performance in that couse.
If you are a student belonging to the arts group it may be helpful if you do an additional couse in the same field.
It is also advisible to go for vocational language classes as leaning a language foriegn or native, is always beneficial.
Good luck!