Respecting the following customs and principles will help make a positive experience for both you and your trekking. Using your eyes and common sense will help guide you – while in India. Try and do as the Indian do, and you will be rewarded with hospitality and friendliness.
 
Religious
Please dress neatly and show respect when entering villages, religious places and trekking: cover yourself from shoulders to knees, and take off hats   and shoes when entering in religious places.

Women should not touch monks or their robes
Please do not touch, point your feet at, or turn your back on Buddha images
Keep your head lower than Buddha statues and monks
Do not take pictures or disturb monks during prayer times
 
Cultural
Wearing revealing clothing and showing your flesh (for women and   men) is offensive to India
Don’t wear bikinis, skimpy clothing, or take   off your shirt in public
In India, your head is ‘high’ and your feet ‘low’
Don’t gesture with your feet, and don’t put your feet on furniture.
Also, do not touch someone else’s head
Kissing and hugging in public is impolite – please be discrete
Please ask before taking photos of people
Support development by buying local food and handicrafts
 
Environmental:
Do not take anything from the forest
Do not litter on land or in water; take all your rubbish with you
Do not buy wildlife or wildlife products
Do not make unnecessary noise
When trekking or riding bicycles, do not leave the route or trample vegetation and crops
 
How to behave on a trek - a short guideline

Do not bathe in streams and waterfalls using chemical soaps and shampoos.
Many hill tribe villagers used to be able to drink the water from streams. Still rivers provide many different kinds of food for the local people.

Do not throw away waste or rubbish even though local people tend to do that as they don't know better. Set a good example.

Do not buy and/or smoke opium/marijuana

From villagers and guides. This could be big money for the guides or villagers, with sad consequences for the villages! Many of which do not even grow their own opium could think to make a good business with tourists. On the other hand all official sides hope to stop growing opium. Please respect! Also village children see foreigners