Selegiline goes well with caffeine.

Unfortunate association with cigarretes aside, nicotine lozenges or patches are easily accessible and provide some benefitial effects too, depending on what kind of performance you desire from your brain at the time. I don't recommend actually spiking the coffee with a nicotine lozenge. But, come to think of it I've never tried. Given how habit forming coffee is already, adding nicotine to the mix would be... interesting to say the least.