1) Don’t use boiling water.
Of course, you can if you want, but don’t be surprised if your tea tastes bitter.
(Add a dash of cold water to the mug/pot first, then hot water, then allow the water to warm the mug/pot, then add your tea/bag/s)
2) take out the tea/bag/s when it’s ready – personal preference, but you can get a good brew surprisingly quickly
Try it without milk, tea doesn’t have to taste bitter. By all means feel free to brew your tea how you bloody well like, but you don’t need to live with bitter tea that needs milk to make it drinkable.
Lapsang souchon is my choice atm.