Preparing for the IBPS RRB PO Exam requires a systematic approach and a thorough understanding of the syllabus. Here are some guidance and suggestions on how to prepare for each subject or section as per the Prelims syllabus:

1. Reasoning Ability:
- Understand the various topics such as coding-decoding, syllogism, blood relations, puzzles, etc.
- Practice solving different types of reasoning questions regularly.
- Improve your logical thinking and analytical skills.
- Solve previous years' question papers to understand the exam pattern.

2. Quantitative Aptitude:
- Develop a strong foundation in basic mathematical concepts.
- Learn and practice shortcuts and tricks to solve problems quickly.
- Focus on topics like number system, simplification, data interpretation, and arithmetic.
- Solve a variety of numerical problems to enhance your calculation speed.

3. English Language:
- Enhance your vocabulary by reading newspapers, magazines, and books.
- Practice grammar rules and sentence correction exercises.
- Improve your reading comprehension skills by solving passages regularly.
- Work on your writing skills through essay writing and letter writing practice.

4. General Awareness:
- Stay updated with current affairs by reading newspapers, watching news, and following reliable news websites.
- Focus on topics like banking and financial awareness, national and international events, sports, awards, etc.
- Make notes of important news and revise them regularly.
- Solve quizzes and practice mock tests to improve your knowledge.

5. Computer Knowledge:
- Familiarize yourself with basic computer terminologies.
- Understand the basics of computer hardware, software, and networking.
- Learn about computer abbreviations and shortcuts.
- Solve previous years' question papers to get an idea of the type of questions asked.

General Tips:
- Create a study schedule and allocate time for each subject.
- Practice time management while solving questions.
- Solve mock tests and previous years' question papers to improve your speed and accuracy.
- Make short notes or flashcards for quick revision.
- Stay motivated and maintain a positive mindset throughout your preparation.

Remember, consistent practice and revision are key to success in the IBPS RRB PO Exam.