Maybe I am crazy but if you are going to quit something - Juust Quit!! It is easier in the long run.
When I quit smoking 6 years ago I first tried the taper approach and failed..... then I just made up my mind and quit....6 years - no smoking.
Will power- it works!! If you need caffiene, drink coffee or caffienated water. If you need sugar eat cake untill you can kick the habit. Just my two cents. Good luck
There is no tomorrow! THERE IS NO TOMORROW! THERE IS NO TOMORROW! - Apollo Creed