Lime juice. Makes anybody else I know wrinkle their nose in horror at the idea, but I love fresh lime juice, or better yet, lime juice, with a handful of freshly picked lemon balm from my garden.
I do wish I had a bottle of russian standard though, a splash of ice-cold, high-quality vodka would not go amiss in it, but I am broke as a motherfucker.
Have to make do with adding a couple of CCs of oxycodone+clonidine solution into the back of my hand instead

*Lestat lies back in his computer chair with his eyes half closed and a contented look on his face*