I smoke over 2 grams per day, every single day, for years. I stopped once for almost 3 days. That was the worst 3 days of my life. I honestly don't know if I could stop or quit on my own. I don't look like somebody that smokes meth, I work, I pay my bills, I have nice shit. I stay away from getting caught up in the lifestyle associated with methamphetamine. For me, it's all about the head change, and using it to enhance my life in ways that it can. You didn't mention why you are stopping, but the longer you continue to get high every day, the harder its going to be. Lots of people seem to develop a guilt complex after doing whatever drug it is that they do for an extended period of time, and convince themselves they need to get off of it and become clean and sober. To those people I say good for you. If it's screwing up your life then thats a good idea. But I have a very open mind about drug use and as long as my drug use does not cause me family/relationship problems, financial problems, job issues or problems with the law, then I have no problems. Too many people start doing meth that should have never even tried it, and it's that whacked out stereotype thats demonized it in many ways.
But get off the fence, so to speak, and if you want out then get out, or keep on keeping on...