If you've tried before, there's no need to kick yourself over relapsing. Quitting smoking, especially through the ways that most people suggest, is easier said than done. If you don't want to waste any more time with failed attempts, it's time to learn how to properly quit smoking!
Quitting is one of those poorly understood things that everybody likes to talk about doing, but very few people actually accomplish. The problem isn't that you're weak, just that you're going about it all the wrong way.
When most people talk about quitting smoking, they think of it as something that you can push through and, if you hold out for long enough, can manage to do. They usually end up making huge lists of things that make them want to smoke, setting quit dates, and in general obsessing about the fact that they're quitting smoking.
Thing is, they're shooting themselves in the foot. You're going to avoid that by putting as little weight into quitting smoking as possible. It isn't a giant mental journey, you're just dropping something out of your life that you never wanted in the first place!
Put simply, you smoke because your mind ties certain events in your life with smoking. Think about it for a quick second: you smoke when you're stressed, you smoke when you have some free time at work, you smoke when you need to "get away from it all."
You don't smoke every hour, or at any regular interval, because your body's nicotine level doesn't dictate your smoking, your mind's ties to cigarettes do!