Tea Practice

http://www.myrecipes.com/extracrispy/meghan-markle-practice-drinking-tea-meeting-queen-elizabeth
Meghan Markle Had to Practice Drinking Tea Properly Before Meeting the Queen
rules to consider:

You should never add the milk to your cup before pouring the tea. Always add milk after.
If you need to stir the milk in the cup, you should use a back and forth motion, rather than a circular motion, so that the spoon doesn’t clink against the sides of the cup, according to British etiquette expert Jo Bryant.
Bryant also advises that you should not blow on the tea to cool it down and that you should replace the cup on the saucer between sips.
You should never drink your tea with your pinky finger extended, despite what you may have seen in the movies.
As People points out, women should take a sip from the cup at the same place every time, to avoid leaving lipstick marks around the cup.
There are rarely foods that require cutlery served with tea (scones and small sandwiches, which you are permitted to eat with your fingers, are more typical) but if you do use a fork and knife, do not put down your utensils while the meal is being served, unless you are completely done eating or must excuse yourself from the table.
Even the placement of the napkin is important: You should never leave a used napkin on your seat. If you’re getting up to leave or to use the restroom, place your unfolded napkin on the table, to the left of your plate.
Your host may consider it rude if you only stay long enough to enjoy one cup of tea—it’s most polite to drink two cups, but three is excessive, according to etiquette expert The Royal Butler.