Consistency

These pictures are from 3 separate squats, but as you can see they're pretty much identical. I'm consistent with my squat pattern, so much so that I even pull the same daft face #attractive

But this post has nothing to do with my squat.
It's all about your goals.

What's the most important factor to take into account when it comes to reaching your goals?

No it's not your nutrition plan. Nor is it your training split or your fancy supplements.

It's consistency.

You can have the best training programme on the planet, and the perfect nutrition programme all backed by the most scientific science. But if you aren't consistent with it, it's worthless.

A mediocre programme that is actually followed will yield better results than an incredible one that isn't.

Practise consistency first. Get fancy later. If you even need to at all.