How do you Solve a Rubik's Cube?

My son was very good at solving it. I think his best was 19 sec. I watched as he did three in a row on stage at his school in less than 2 min's. He memorized many routines and practiced a lot. He's very good at memorizing. He was up to 150 digits of pi. And as we all know these skills are useful in the real world. That is.. if you're from Vulcan. Actually, I'm sure honing your memory to this degree is great, I just don't remember why.