Lord Chaitanya Mahaprabhu practiced Kirtan, or chanting. One should always chant the Name of the Lord, because the Name of the Lord and the Lord are not different. Lord Chaitanya's instructions to always chant the Name of Krishna, and Krishna's injunction to remember Him always, are not different.
The Lord and His Name are not different from each other. In the absolute status, there is no difference between one thing and another. Since the Lord is Absolute, there is no difference between His Name and Himself: He is omnipresent. We should know Him always, twenty-four hours a day.