I don't add sugar to my iced tea anymore. A friend of mine asked me once if I were a communist since I'm southern and don't drink sweet tea.
I put a pan of water on the stove, probably a quart of water or so. Bring to boil, add six family size bags, remove from heat, cover with lid. Let steep for about five or ten minutes. This is a matter of personal preference, depending on how strong you want your tea.
Then I pour the tea into my gallon size pitcher and fill the rest of the pitcher with water. (To fill the pitcher, I add water from the faucet to the bags in the pan and pour this in until the pitcher is full.)
If you want to add sugar, put the sugar in the pitcher before you pour in the hot tea.
There are so many different ways of making iced tea, some being very complicated. But I keep it simple since we drink iced tea all day long around here. You can add ice to the pitcher instead of water if you plan to serve the tea right away. That way the tea will cool down quickly and won't melt the ice in your glass.
ETA: I buy Luzianne tea because I prefer it. But Lipton is good too.