It's easy if your hormones are in balance. Thin people don't go snacking all the time, it's the chubby folks who do that.

For example, if your cortosol (the "stress" hormone) is high, you will be craving snacks. The moment it's back to normal (you don't have stress) you can sit around and not want snacks.

As other posters said, it is extremely hard to avoid snacking when your body craves them. It is extremely easy to not snack, when your body does not want them.

Stop throwing around this "easily" "its easy" around. If it were easy, we would not have this conversation.