How to prepare for GDPI & WAT for cat exam?

Hi Aspirant,
Learn to create opinions on topics.Speaking is not something which you can develop overnight,it takes time and hard work to gain speaking skills.The biggest point is not going numb and also not speaking too off the charts.
Make reading a hobby.Reading on various topics,issues,abstract journals makes you develop a say,an opinion.Also,having sound knowledge of technical terms is very useful,as anything related to the subject or your interest in definite terms is much more worthy than in vague terms.
Understand this,mostly English is not the ultimate requirement.What matters is whether you can exchange ideas and convince them that you have good interpersonal skills.
Have an open mind,explore and achieve.
Hope this helps.