It never does to generalise but it's still true that most Russians are proud, free-spirited and don't like being bound by rules. They are generous and passionate and may well express themselves forcefully. Their respect for equality predates Communism as for centuries the agricultural commune was at the heart of Russian life.
Always dress well in Russia. They will think the less of you if you're scruffy. Shake hands firmly and maintain eye contact. Don't worry about clichés of hugs and kisses. These things will only come later when you are on good terms with your counterpart.
Russian names come in three parts: the given name, followed by the patronymic (version of father's name), formed by adding -vich or -ovich for a man, -avna or -ovna for a woman. After that comes the surname. So Ivan Alexandrovich Borodkin is Ivan, son of Alexander, of the family Borodkin. Formally, people use all three names. You only use first name and patronymic on their own when you become a friend.
If you are invited back to a Russian's home for a meal, take a small present. Wine is preferable to vodka. Or take flowers - in odd numbers (and never yellow ones, which may signify displeasure). Take off your outdoor shoes in the hall. You will be given slippers for indoor wear by your hosts. At the meal, wait to be invited to start. Don't put your elbows on the table and leave a little food on your plate when you've had enough.
Out and about, don't be shocked by surface rudeness, particularly from shop assistants, doormen and minor officials. If you remain polite but firm, they will soon come round. At other times Russians can be quite genteel. The word nyekulturny was traditionally used to describe uncouth behaviour and covered anything from keeping your hands in your pockets to laughing too loudly or swearing. Such strictures are a bit outmoded now but you should, for example, always check your coat into the cloakroom (garderob) at a restaurant as hanging it over your chair would be regarded as bad manners.
When it comes to conversation, avoid discussing the fascinating but sensitive subjects of oligarchs, corruption until you know your hosts extremely well. Sport, holidays, your positive impressions of their country and its gorgeous landscape or architecture, funny things about your culture are, as always, the safest topics.