Okay, this sounds like one of those cheesey entertaining tips I used to make up for Bon Appétit, but this is actually worth doing. Buy some fresh herbs, stick them in your water. Pour yourself a glass whenever you wish. Because the water isn't hot, the herbs just barely flavor it, rather than making it like tea. In fact, if you let a few of the herbs spill over into your glass, most of the "taste" will come from smelling them while you drink.

I used lemon verbena, mint, and lavender. It makes me WANT to drink water. Something I often forget to do in between my hot beverages. Brilliant for the crazy-hot weather we've been having. I just kept filling the pitcher back up with the same herbs in it. They stayed fresh as long as they were submerged.