काकचेष्टा बकोध्यानं श्वाननिद्रा तथैव च।

Our efforts should be similar to that of a crow (They should be repetitive or continuous). Focus on work should be like a crane (A crane stands still to catch fish). Sleep should be like that of a dog (Alert). We should eat less to avoid lethargy. Stay away from home or comfort zone. These are the five signs of a good student or learner.