I only did snuff once but I smoked cigarettes for 15 years before quitting.
As cheesy as it sounds, you REALLY have to want to be a person who no longer uses tobacco. Making that commitment to yourself is the most important thing. I "wanted" to quit for at least 10 of those 15 years, but I obviously didn't want it bad enough. Nope, I wanted my fix more.
As for the quitting process itself, I bought one last pack of cigarettes and gave them to my girlfriend to ration out. 5 on the first day. 4 on the next, 3 after that, 2, 2, 1, 1, 1, something like that. I actually ended up tossing the last few out.
My sex drive was basically shot for a month after quitting. I put a lot of weight on because I snacked like there was a pack of Camels waiting for me underneath those potato chips. That's part of the process for a lot of smokers.
However you pull it off, you'll need to tough out the suck. For cigarettes the first two weeks were miserable and I really felt like I was out-of-the-woods after a month.