Use the color of blue, white, black and green - maybe a little contrast with red.
Business card - simple, maybe try to use the brocaded idea of a logo. simple, readable text, not too much illustrations, you could play with typography, rather than with too many pictures. there might be some ornaments to spice up the thing.
Gift card - bolder than business card, stylish rather than soft. bold colors, different elements like old pocket watch (referring to take time for yourself)
Newsletter - happy, positive and simple - something that would call you to read the text. possibility for me to add a picture that goes with the theme I´m writing on.