The exam is easy to crack if it is planned & followed strictly by the candidates. Here are some preparation tips you can follow for the exam:
The Aptitude for Service Sector section of NCHM JEE aims to test if you possess these skills. This is the only section that has no negative marking. The best way to crack this is to remain true to yourself and answer as per your personal judgement.
Attempt previous year sample papers.
Give mocks both online-offline
Analyse your mocks-know your weak and strength areas
Keep practising and follow a routine sincerely