What are preventive measures of drought?

We can do the following to prevent drought:
1. Grow more trees

2. Develop irrigation facilities by building dams

3. We should indulge in rain water harvesting

4. Save water to prevent drought

5. Spraying water on the base of the plants so that less water is used

6. Growing drought resistant crops like millets, maize and sorghum

7. Build a canal to divert water

8. Store water for future generations

9. Put more wells and tubewells

10. Store water when get a good rainfall