Basics of attaining lucidity:

Recognize Dreamsign>Reality Check>Lucidity

The reality check is a 'conscious decision', but the appearance of the dreamsign is not. Is there a school of thought that says we somehow subconciously create the dreamsign to prompt the reality check? If so, does anyone have a way of 'sowing' dreamsigns into their dreams for an increase of reality checks leading to lucidity?

Thanks,
Legend