I'll join the never had luck with tapering crowd but I have tried it and know there are websites out there that give advice on how to taper based on your alcohol intake quantity and length of use.
Found them by a Google search and if I remember correctly quiet a few came up.
However, I'd agree on seeing a doctor who understands addiction if this taper doesn't work. As you can tell by the responses it hasn't been very successful for most of us here.