Mental tricks that people use to themselves believe things that are false are called

Mental tricks that people use to help themselves believe things that are false are called "Self-deception strategies".

Self-deception is a procedure of denying or justifying ceaselessly the pertinence, noteworthiness, or significance of contradicting proof and consistent contention. Self-deception includes persuading oneself regarding a reality (or absence of truth) so one doesn't uncover any self-information of the misdirection.  

Self-deception raises doubt about the idea of the individual, particularly in a mental setting and the idea of "self". Mindlessness is the establishment whereupon the contended conundrums of self-duplicity stem, and it is argued[weasel word] that not every person has the "exceptional abilities" and capacities with respect to self-trickiness.