I would put prayer with methods of intense visualization and with the hypothesis that dreams are drills or rehearsals. The mother-in-law preaches "Law of Attraction" where you can attract good things if you concentrate on good things but bad things if you concentrate on bad things, with "manifestation" being the related idea that if you picture yourself in the desired circumstance, the law of attraction will pull you towards that eventuality. I put this woo through a distillery and came up with what I think is a rational inventory and instruction set of moving parts: If you intensely vizualize a circumstance you are not in but want to be in, or, if you know what you want to be the end product, the degree of 'reality' with which you visualize it can trigger iterative reverse engineering that probes back through parameter space to the available starting conditions. If you want the job in the shiny building, you visualize yourself in it, you make it so real that you can barely believe your fortune, and you are forced to ask yourself, "How did I get here?!", and that tricks your subconscious problem-solving abilities into grappling with it as if it were a real-life / non-hypothetical problem.
I've got zero tips or insights on making yourself a "better person".