Ask HN: How to responsibly come off a caffeine semi-addiction?

Somewhere between a coffee and Red Bull junkie, I recognize that I probably consumer too much caffeine every day. On days that I don't have a cup (or 4), I get headaches and am severely less motivated. Any suggestions on how to effectively transition from 3-5 cups a day to being the same 'me' without any cups? Any advice is appreciated. [From the surface, this solution may appear simple, but for those consume large amounts, they know it's not]