Ugh. Rough day, lots still to do. The answer – Lapsang Souchong, or “Warrior’s Tea”. I used to drink this while playing arena, hence the nickname.
Hmm… I’d say it was fairly neutral in flavour, but there’s a hint of a malty aroma, and somehow a piping hot cup of this seems to focus everything a bit more. Great for getting on with things, I hope ;-)