Radek Sienkiewicz

Hi, I'm Radek.

Above the surface: growth and conversion optimization consulting at Nextommerce.
Below the surface: reading books, playing basketball, fascinated by data science.
We all learn so many things every day. It would be a shame for all of it to go to waste. This is my attempt to share as much as possible.

Recent articles

My new best friend

I was stuck with a toxic friend and a stranger. I've replaced them with two great guys.

March Challenge: The effects of zero sugar and zero news

March Challenge summary: zero sugar, zero news. How it went, what I learned from it, will I keep doing it?

February Challenge results: The effects of publishing daily for a month

February Challenge summary: Daily publishing. How it went, what I learned from it, will I keep doing it?

January Challenge results: Great effort, great outcome, needs modifying

January Challenge summary: what it was, how it went, what I learned from it, will I keep doing it?

What happens when your article is mentioned in the Morning Brew newsletter?

What happens (and what doesn't happen) when your article is mentioned in the newsletter that goes out to 2m+ people.

Recent books

More good stuff