DON'T be the first to bring up business at a meeting. Let your host bring it up first. This will usually happen after some get-to-know you small talk.
DO schedule meetings about two weeks in advance and have it confirmed in writing.
DON'T bring a gift at the beginning of a business relationship. Also, gifts should not be exchanged at a formal business meeting.
DO be on time. In some parts of Brazil, they are very casual about punctuality, but as a guest to their country, don't be late. However, in Sao Paulo and Brasilia, meetings tend to begin on time.
DO be patient. Brazilians negotiate slowly.
DON'T change your negotiating team while negotiations are in progress. Brazilians prefer to negotiate with the individuals, not the company as a whole, and changing your team could set things back.
DO business face-to-face as opposed to over the phone and email.
DO impress your Brazilian business associates by staying in a nice hotel.
DO expect to be invited to have a drink after work.