Tony,
Only worry about today. Tomorrow should never be in your mind. Today is the day you quit and quit like a Beast. Tomorrow you can follow the instructions on the back of the shampoo bottle, rinse-later-rinse-repeat.
The first week is damn hard, there is no sugar coating that it sucks which is why it is referred to as "The Suck", then as time progresses you will start to forget about Nic, then at around 2 months Nic will try to take you back. All you have to do is nut up and take your life back.
Pinched