First it is very good habbit to stay updated and its help you preparing for such exam like RRB, IBPS, SSC and other bank exam. These jobs have their own respect in our country india.
But it is very difficult to stay updated with all the latest current affairs all time because in world there is something happen all the time.
Current affairs and general awareness are such topic that cover lots of thing like education, politics, sports, economy and many more.
But there are few things which help you to improve your general awareness and some how to keep updated.
One of the best method to stay updated is Newspaper. So on daily basis read newspaper. I suggest you read 2-3 newspaper daily. If you read one news in Hindi and English newspaper it can improve your English section. Read the news paper like Times Of India, Hindustan times etc.
. In today era social network is very helpful to learn new things . For Current affair or general affair you can subscribe Current affairs blog to get all the latest updates, or you tube channels.
. There are many sites who provide online quizzes and daily win quizzes to improve your knowledge.
.There are some goods available in market which helps you to improve your skills like Pratiyogita Darpan and Competition Success etc. By the way, there are no particular books to prepare GS section, you have to be updated from everywhere you can.