What’s a song that helps you focus or concentrate?

It's definitely Revenger by F.O.O.L.

I love using this for focus and concentration whether I'm at my keyboard or at the gym. It's a super versatile hype song. I originally discovered this song via the "Fendetta's Beats playlist". (I was looking for "cyberpunk EDM". If that sounds interesting to you, I highly recommend this playlist -- if you're open to Spotify.)

The sole spoken line in the song is well-timed at a fairly early drop. It's haunting -- in a good way.

I love this song so much that when I heard it just now, I just had to tell someone about it. I decided this would be a great opportunity for my first "Crucial Tracks" post!