Touching The feet of Elders - Why should we do it?

How to address and call Srimad Narayana in a Specific Situation

1.While taking medicines - Vishnu
2.While going to sleep - Padmanabha
3.while getting married - Prajapathi
4.During War&Battles - Chakrathari
5.During Travel -Thirivikrama
6.Last days of life- Narayana
7.While talking to friends -Sridhara
8.If you get bad dreams - Govindha
9.During difficult times -Madhusudhana
10.While going in a seperate path - Narasimha
11.When facing danger because of Fire -Jalasayena
12.When facing danger because of Water - Varagha
13.While climbing the Hills - Raghunandhana
14.While walking on the road -Vamana
15.Whenever and Always - Madhava