I genuinely ask this question with zero sarcasm.

Whenever I have a client who tells me all about their magical diet that's going to really accelerate their fat loss. I listen and pick out all the things that stand out where I believe it's conducive toward long term change. We reevaluate in two weeks and if nothing has changed, I will ask them about their diet and how that's working out for them?

"Persistence isn’t using the same tactics over and over. That’s just annoying.
Persistence is having the same goal over and over." –Seth Godin

It's one thing to decide you want to accomplish "x" goal. It's a completely different story when you go down a path that doesn't work and instead of changing course you keep trying to jam that square peg in the round hole. I will have in mind the goal, a singular focus, but how I get there doesn't matter as long as I get there (assuming I'm not cheating or hurting anyone of course).