How I can beat people with 00:00.1.5 seconds

So yeah I literaly won that game with 00:00.1.5 seconds. You may think he is a noob or something. NO! he had 1811 rating in bullet. So here is the game

Heres how I did it:

1. PreMove - You can do it at starting, But be careful! But when its ending and your opponent is low on time, JUST GO CRAZY!! give them random checks, do unexpected moves etc.
2. Choose one opening - Just play one opening every game then if you memorize it you can play it like a lightning!