For the best cup of Hot Tea : 

1) Bring fresh cold water to a full, rolling boil.

2) Use one tea spoonful of loose tea or one tea bag per cup.

3) Pour the boiling water over the tea.

4) Steep three to five minutes.

For Iced Tea, 3 solutions :

1) Make a strong hot tea, 2 tea spoon per cup, then pour your hot tea over ice.

2) Take your hot tea, remove the tea leaves and put it in the fridge. 

3) Put some tea bags in a recipient full of cold water (bottle of water for example) and let it in the fridge.