Hello Aspirant, 

The additional courses that you need to do to make your personal profile look strong depends completely on you. Means what you want to do in future or what is your future endeavour to achieve a particular job or some field. Depending on that, you can apply for various online and offline courses to groom yourself. I can suggest you to learn any foreign language and can pursue the field of interpreter and translator ahead if you do not have any plans. But if you do have some prepared for yourself, then stick to the basics and master'em all.

Hope it helped you..