Buying & steeping loose leaf tea instead of bagged garbage. Higher quality, lower price, actually tastes decent with multiple steeps. If I don’t finish the leaves, I fill the teapot with water to have cold brew the next morning. If you get into it, an electric kettle that lets you set the temperature is essential since you can avoid burning leaves much easier & unlocking more delicate leaves that require lower temperatures. Last tip which should be obvious: no milk or sugar & if you think it tastes bad, why do you keep buying black tea instead of something good?