Here are some answers to this question
Don’t immediately start answering the questions. A good idea would be to scan through the paper once because you may miss out some easy questions because of time constraint.
You can use to follow a standard order as far as subject-wise answering is concerned.
Reasoning( because Reasoning questions can be solved fastly as they are mostly logic based ) [35 min]
Maths( You could afford spending 1hr on it).
English(Requires Not more time)[15 min.]
Computers (Rest 10 Mins)
(In mathematics Most Important Chapters are (1) Vectors (2) Probability (3) Trigonometric Ratios (4) Straight Lines & Pair of straight Line (5) Progression(6) Definite Integral (7) Permutation & Combination (8) Application of Derivatives [More than 30 questions were asked Every year from these Chapters])
Lastly, refrain from giving unsure answers to questions because even a single mark can badly affect your rank.
The big difference I feel is that most people just talk about developing strategies and keeping yourself calm and gaining confidence, speed, accuracy, etc. through a series of preparatory tests and self-evaluation.
Top rankers actually put these things into practice.
It is not necessary that You follow the given order the portion which seems easy to you you should more focus on that part but remember it that marking scheme in NIMCET (more waitage of maths then reasoning then English finally Computers).
Different Tricks for NIMCET
Wish you guys great Luck