Hard work and smart work!
Being a hard worker is good but being a smart worker is much more important.
I cleared my SBI PO examination in my first attempt but for that I didn't just work hard but I worked very smartly too.
I knew I was always good in English and hence didn't use to study English much but while giving mocks I always ensured to check my marks in English.
I knew that Reasoning is tougher in Banking examinations for the obvious reason that you need your reasoning power while making decisions related to credit and other baking matters, so I gave double emphasis on Reasoning using the time saved from English.
You can also do various such analysis and shift your burden smartly.