I dip currently, and have on and off for almost 7 yrs. I never found it hard to quit for awhile and always returned because, to be honest, I enjoy it. Get some sunflower seeds if you're having trouble and just spit those all day, kind of like the oral fixation thing cig smokers have.
I just came across this link in a recent internet search:
http://www.freepatentsonline.com/6619293.html
Its about alternatives to cig's and chew; quote about chew: "A chaw prepared according to the present invention is made with tea leaves which have been roasted, but not fermented, and is flavored with vanilla, cinnamon or mint" havn't tried it but sounds interesting.
Side question: I just got several tins before figuring out that I would have to stop for about a month, anyone on here know the best way to preserve them? I've heard freezing them dries it out too much.