I'm the only coffee drinker in my household. A full pot of coffee encouraged me to drink more than I wanted/needed. The single cup coffee makers (like Keurig) seemed expensive. And don't get me started on "premium" coffee shops!
I started making a coffee concentrate with 1 scoop coffee in 2 oz of water. (I make 30oz at a time). Keep in the refrigerator. When you want a cup, mix 2 oz of mix with 4-6 oz of hot water and Voila! A single cup of coffee that's no more expensive than making a pot.
Place coffee grounds in container, add water. Cover and refrigerate over night. Strain out the coffee grounds (use in your garden) and keep concentrate in the refrigerator.
To make it easier to strain, I fill the large tea bags (purchase at specialty tea shops).