Don't worry – it's not as hacky as it sounds. It's good, solid "tried this and it works" advice from published author Rachel Aaron.
I think everyone should take a few minutes to read this.
From the world of clever narrative timeline visualisations – check out this article on some clever visualisations of Memento:
And as they mention there are some cool diagrams on the Wikipedia page too –
I really like the ones that employ the U-turn structure, so the B&W flashbacks (which go forward chronologically) zip together with the main colour narrative, which is chronologically reversed:
Look very closely at this last one. Very clever indeed. Anyone reminded of how DNA folds?
I might see about inverting the colours and printing it out for a more detailed look.