Nice topic, thanks.
I myself went through a Neville Goddard stage recently.
I’d like to make an addition;
While all the mentioned methods do work, they’ll exhaust your own energy unless you align yourself with the flow of the energy.
Allow me to remind the ultimate inexhaustible booster; Reverse the flow of light, and do not get results, but give results.
Of course, either way is fine, go about getting results if that’s what makes you happy. It’s just that sooner or later all come to the understanding is that one source of energy is dependent and the other is not so much.
TL;DR: Mastering the flow of thinking is the ultimate mental work. The giver has it, and the taker does not have it. Yet, both can manifest it.