Dress to ****, don't show everything. Pass smiles, be polite to everyone. Keep your voice down, never to laugh out loud. Eat a modest portion, and only one piece of cake.
Walk gracefully, poise in every move. Sit up straight, legs daintily crossed. Hold your wine glass by the stem, never by the bowl. Take a sip by looking into, never over the glass.
There's nothing in the world like proper etiquette. You can always tell a lady has good breeding by how effortlessly classy she is.