Here I am giving you some tips to improve your general awareness for Bank PO examination below :

You have to read daily newspapers, magazines, journals, competition preparation books, etc to increase your general awareness.. and you must listening daily news broadcast on TV or radio..
You have to make notes for important topics of general awareness examination and revised them regularly .You must give at least 8 to 10 hours per day for studies
For better preparation you have to solve the previous year question paper of general awareness for Bank PO examination or you can buy books for it

Here are some of the books which you can use to prepare for general awareness are ::
Competition success,
Arhinent publication books