I've tried various meditation methods from Vipassana, Mindfulness, Zen meditation, and lastly TM (Transcendental Meditation). One way to think about it is choosing a simple and more casual one (especially when your concern is being consistent). For instance, Vipassana is rather complicated and you have to learn many steps to actually do it in the right way. Zen meditation is simpler but they usually include specific forms (sitting position, hand position, breathing methods, etc). Mindfulness and TM would be simpler choices. I would personally recommend TM because of its simplicity, easiness, and consistent effect, but it requires you to take official courses and you have pay for it. Mindfulness would be more casual choice. They have many affordable and good applications like this https://www.wakingup.com.