Your effort is meant not to allow yourself to be distracted by other thoughts. —-Maharishi Ramana.
Comments; Main obstecle in mediation is our mind. our mind can never be take rest , every time it is running after worldly affairs. if you look inside on mind you will find that is is working every time. and it takes pain from outgoing tendencies. we have too much knowledge but this is only memories. real knowledge of the self is hidden under the thoughts of the mind. so for real medition our aim should be on emptying the mind so that we can touch the bliss. our Indian Saints said that Samadhi and deep sleep are like sisters. in deep sleep mind goes inside and touch the self but due to sleep there is ignornce but in Samadhi mind goes inside by our effort in awakning and touch to self. so our effort is meant not o allow ourself to be distracted by other thoughts.I am doing methods of medition like observing the mind and Nam-Japa , it is right but we can not explain by words bacuse it is divine experince.