In continuation of how to get back to study mode:

4. Health checkup:
Check your vitals like vitamin D, B12. Consult a Dr for vitamin supplements. They have a huge impact on our cognitive skills (thinking, memory, etc)

5. Keep your family in loop: Although isolation may seem more comfortable, keep socializing with friends and family.

6. Breathing techniques: Choose any one breathing technique that you will follow every day.

All the best!