The first thing you need to do is to make a proper and programmatic time table. After that, go through the entire syllabus. Always be punctual with your study plan and follow it religiously. Make a habit of reading newspaper daily to enhance your skills of vocabulary and reading comprehension skills. Don't skip a single chapter. Study on a regular basis. Practicing last years' exam papers and sample papers will help you to understand how much you're prepared. Get the best books and study materials. Go through travel and tourism related books, such as Outlook, Traveller, Destination India and Go Now.RS Aggarwal's Book for Quantitative Aptitude. Arihant General Knowledge, Pearson India Yearbook for GK. Arihant General English for all Competitive Examinations and Pearson's English for english language section. Verbal and Non-Verbal Reasoning by RS Aggarwal. Books for Service aptitude- Arihant Study Package for Hotel Management and Hospitality Administration, Hotel Management Entrance Exam Guide by Gladvin Rego etc.