Struggling to stay consistent

I have been trying to focus on my manifestation right but most of the time I just forget about it. Like I listen to subliminals when I sleep and say all my manifestations in my head before I sleep, telling myself I’ll do robotic affirmations the next day or in the week, but then the next day I literally forget about it.
Is this normal ?? At times when I remember that I’m manifesting something I feel like I’m not doing enough for some reason.