Consistency is the key
As you might know that every exercise requires consistency. Any exercise is ineffective if it is not done regularly.
Mewing combined with jaw training is the quickest way to get a visible result. You should take these techniques as a part of your routine.
Forgetting is a flaw in human nature. Don't rely on your memory, but make a routine, set reminders and stick to it. That's the only way to get results in superfast time. Good luck!