For UPSC and state PCS aspirants perusing their goal with Psychology as optional subject.
If you have opted Psychology on basis of your interest then first of all let me tell you this:
Only few people have courage to follow their interest and the probability of your success is increased significantly when you are enjoying the process so you have already GOT, what it takes to crack this exam.
All you need is a acute plan and self-discipline to excute the plan. And a little bit help