Prayer is a very important activity we have, it is a private talk between the devotee and the Lord. Akrura simply attained perfection by praying. In skanda-purana the glories of prayers is mentioned "A devotees whose tongue are decorated always with prayers is greatly respected even by saintly persons and such devotees are worship-able by demigods." It also helps us to establish our personal relationship with Krishna. because we are praying to Him, as that is our communication with the Lord.