Sandeep Ray

The position vector is a coordinate of an object in a plane or space concerning origin and direction is directed from the source toward the coordinate. Whereas Displacement vector is the shortest distance between the initial and final point of a whole continuous motion, and direction is from starting point to endpoint. 

The displacement vector is the difference between the two-position vector. 

Positon vector is used to locate an object in space or a plane. 

First thing" There is nothing like talent. All matter is about how much we put effort and dedicate toward it."

Some steps from my real-life experience:

1. Decide what to do. 

2. Collect information about it. 

3. Build a strong reason to learn it. 

4. Collect specific material related to it. 

5. Start from basic ( if the basement is strong enough, then the building will be more substantial) 

6. Try to improve 1 % continuously besides of enormous burden. 

7. Track your performance and introspect it. 

8. Give a treat to yourself for every achievement and a small gift for every try. It keeps you motivate. 

I hope this will help you. 

Every subject has many things to know. If you study for exam-oriented, then
1. see the syllabus and previous year question.
2. collect your resource and consult with your teacher.
3. review any subject part by part continuously.
4. revise what you have read at regular intervals.
5. give the practice exam and evaluate itself.