Constant rememberance.

Should you think of God only at the time of meditation and remain forgetful of Him at all other times?

Have you not noticed how during Durga Puja a lamp is kept constantly burning near the image?
It should never be allowed to go out. If ever it is extinguished, the house-holder meets with some mishap.

Similarly, after installing the Deity on the lotus of your heart, you must keep the lamp of remembering Him ever burning. While engaged in the affairs of the world, you should constantly turn your gaze inwards and see whether the lamp is burning or not.

• Sayings of Sri Ramakrishna