My meditation is hardly regimented and strict, and is the result of many hours of searching the internet for proper meditative technique. I would say it most closely resembles Zen meditation, as it is primarily centered around maintaining a steady breathing rhythm and concentrating on nothing.

I try to meditate several times a week, though I rarely meet my goals. I'd say an average of twice a week for the past few months.

With respect to your comment about the green tea, you will certainly acquire a tolerance to the caffeine after consuming it for an extended period of time. While I no longer experience the caffeine boost that I used to, I still nonetheless feel more alert after drinking.

I get my tea from a local shop in Athens called Fooks Foods which specializes in oriental imports.