Double shot espresso with sufficient extra water to almost fill a tea cup +2 sugars, no milk- one at breakfast & one after evening meal.
Have used our Gaggia Baby machine for around the last 14 years, but when 'on the road use a Moka pot like in Bidja's post. (with an Aeropress as back up)
Prefer Vittoria beans to most others, although have recently compromised with Vittoria pre-ground whilst travelling. Buy 1 kg packs when they are half price - fairly regularly. Hand grinding was becoming too much of a chore.
If offered instant coffee I'll ask for tea.