Looking for advice on cheap / enjoyable caffeine sources.

I currently have a 2-3 energy drink per day caffeine habit, which is a bad thing due to the expense if nothing else. A couple months ago I tried to switch to making my own coffee, but it turns out that's harder than it seems and the drip coffee maker in the App Academy office makes pretty weak coffee that I don't trust to stave off withdrawal symptoms (which I really don't want to have affecting my productivity right now).

So now taking recommendations for caffeine pills / coffee machines / tea brands / whatever else.