After crafting waaaaay too many potions the last couple days, most with wonderful effects like 'drain agility' or some other claptrap the shopkeepers are just begging for, I'm wondering what useful creative potions you guys have made. I've got the big list in that bible sized guide to the game, but I'm hate working through spreadsheets, and what sounds useful and what actually is useful are often different things.

For those of you into alchemy, what cool potions have you managed to put together using three or four ingredients that help you out?