This is absolute rubbish:
The "three day wait period" is a huge pile of stinking garbage.
Sure, you're a busy guy, but you can't make the time for a 10
minute phone call? If you ask me, that's a bit try-hard.
Here's how I see it:
If the girl that you n-closed is so great, why would you wait
3 days for her to meet another 12 guys? She probably forgot
about you by then.
Matador once said what he likes to do, is to text the girl that
night while they're in the club. And to not ask for anything. After
you close, just send a text saying "Hey, how ya doing?

"
And that will show that you like her and think about her. If you
are playing "The Game" correctly, you will number close in any
stage after A2. Likely, A3.
So, if she's attracted to you, you can show that you are STARTING
to get attracted to her. And that's the cat string theory.
Acting like you are on the edge, but not quite there, will make her
chase you even more.
CALL THE VERY NEXT DAY!!