As far as I can tell they all work (N=1 and all that), so I'd say that whatever you find easier to actually do is what you should do - just keep it up as often as you can over time.
If you wanna get a little geeky about it like I was, could consider buying a Precision Xtra to measure your glucose and ketone levels. For me this was helpful because I could see changes in the numbers after changing my eating habits. Had I not seen that, I would have only my scale to see body weight, and would've just looked at that and thought "looks like nothing changed, maybe this isn't working / doing anything at all." This also allowed me to "gamify" the whole process a bit ("I wonder how low I can get these numbers to go? how long I can stay there?" ... etc).