our brain is like computer...

when the hard disk is is nearly full ,the pc becomes slow.....

u need to clean the disk or defragment the files

 

so just remove unwanted things from ur brain.....which is not required at this

 

point of time.....and try to concetrate on work

it will help u a lot........

 

all the best...!!!!

 

also see this....

 http://www.goiit.com/posts/list/counselling-im-totally-disturbed-19587.htm#111394