It also helps with the Zero-style ones that they use a couple of different sweeteners.

One of the tricks I found is that when I occasionally want sweet tea, I'll take a packet of Equal, sucralose, and stevia and add to my glass. You get more of the sweet but without enough of each one that the bitterness or other weird taste you get when you use enough to make it super-sweet doesn't happen. It just tastes sweet.