Not having slept through a night for the last 15 months or so, I've got into the habit of drinking a pretty ferocious coffee at about 11am, by which time I will already have consumed a decent four mugs of tea. I find this keeps me going til my next cup of tea at about 3pm.
Given another 15 months or so, I might graduate to the Ozzy Osbourne method, as related in the ST the other week:
...the best way to wake yourself is to brew a pot of fresh coffee, then run it through the machine a second time using the old grounds. While you’re doing that, make an espresso. Then add the espresso to a mug of the double-brewed coffee. In my house, we call it a “red-eye”.
Anyone given that a go?