Autosuggestion is a temporary fix. It's much better to genuinely alter the way you think, most easily accomplished through good reality check habits.

Reality checks will help all lucid dreaming techniques. If you decide to go after WILD, reality checking will ensure that once you succeed in getting into the dream, you know it is a dream, and not a failed WILD attempt. Reality check after any awakening, as this will safeguard you in a similar way from losing lucidity to false awakenings.

The effort, the change in mindset, that results from properly reality checking will last and last. So, do it!