Quote Originally Posted by zeppy
What would be some good Russian Christmas greetings for instance to write in a Christmas card.

I'd like to say something like "Wishing you and your family good health, good luck and happiness this Christmas season and always"

Also, how would you say "I hope all is well with you"
chaika's translation's acceptable. Though I'd say:
Желаю Вам/тебе и Вашей/твоей семье крепкого здоровья, удачи и счастья в это Рождество. Надеюсь, что у Вас все нормально.
I wouldn't use 'and always' in the Russian translation.