Business cards are exchanged and Indians are very conscious of the protocol. Always present business cards when introduced. English is appropriate for business cards.
Decisions are strongly influenced from the top. Usually one person makes all major decisions. Attempt to deal with the highest-level person available.
It is considered rude to plunge into business discussions immediately. Ask about your counterpart’s family, interests, hobbies, etc. before beginning business discussions.
Business is slow and difficult in India. Be polite, but persistent. Do not get angry if you are told something "can't be done." Instead, restate your request firmly but with a smile. Plan on several visits before you reach an agreement.
You may be offered a sugary, milky tea, coffee or a soft drink. Don’t refuse. Note that your glass or cup may be refilled as soon as it is emptied.
Indian counterparts may not show up for scheduled meetings. Be prepared to reschedule.