You have already went through the toughest part. If you can make it 4 or 5 days without going back, all you have to do at that point is remain committed and strong, as you've experienced the worst part. Just stay motivated and committed that no matter what, you are going to remain tobacco free. Make it a goal. Think of that tobacco as if were Osama bin Laden you were fighting. If you don't go back, you are kicking his ass! But if you break, then he takes you. As silly as that sounds, thinking of it that way gives you that extra strength, motivation and willpower to fight the craving for nicotine.
As has been said, the first week is the toughest. After that your intense crave will subside somewhat. But you will still think about it and have at the least a mild craving for it daily for some time after. You may even experience a day in which you find yourself having a sudden and intense craving a month or two later that hits out of nowhere and drives you nuts. But just don't break. After that it's all gravy! I would say the first week is the toughest, the first month is somewhat tough but yet manageable and the second month is much better, but still with the occasional craving. But you can make it and remember, you have already experienced the WORST part. The first week is a combo of serious physical and mental. Later on it's just all mental. The mental is much easier to deal with if you know how to fight it. Staying busy doing something is a great help. When I stopped as a teen (even though I was young I had dipped many years because I am a country cornfed bastard...lol), I started putting together model cars and jet fighters as a means to keep my mind completely occupied at times when I would have otherwise been obsessed with thoughts of tobacco.
So my advice is to remain motivated, for whatever reason works for you. It could be health, cleanliness, saving money, avoiding heartburn, whatever. Just use it as a means to reach your goal and fight like hell. And after it's over and you've defeated the bitch, be proud, because you will have broken an addiction that many describe as being heroine like. As tough as it is to quit smoking, dip is even worse. The average size dip on snuff contains 4 times the amount of nicotine as a cigarette. So be proud and keep in the fight. You'll make it.
And perhaps the biggest motivatioon of all.....think of all the $$$ you will save that can be put toward ammo and gun accessories! Good luck man, hang in there.
-CH