Quitting both smoking and drinking at the same time may be a bit much to handle. I quit smoking in 1991 after 20 years. I still have cravings every so often! It is a bear. Now I am quitting another addiction and I am sure that it will be a bear too!
Maybe you should focus on one thing at a time. Which ever you choose to quit, booze or smoking, will probably demand all of your effort. Best of luck!