Wintergreen tea contains a drug, methyl salicylate IIRC, that works as a pain reliever like aspirin, aspirin being the synthetic form (acetylsalicylic acid). The herbal version in wintergreen seems to have sedative effects like aspirin, but feels different if you want to spend a quiet moment being mindful of it's effects. Try not to fall asleep, though.
Opposite in it's effects is mint tea, a stimulant, which might make it difficult to sleep. OTOH maybe worth brewing if you have an especially active day ahead or if you are feeling tired and something to sharpen you up is needed. Again IIRC, mint tea can be used as a coffee substitute.