Editorial Note: We earn a commission from partner links on Forbes Advisor. Commissions do not affect our editors' opinions or evaluations. Businesses know that it’s vital to invest in staff. But after ...

I am obsessed with personal development because it's helped me completely change my life. Only 10 years ago, I had no connections, no money, and worked a minimum wage retail job. Now, I have a Ph.D.

Tomasz Głowacki is a data scientist at Żabka Group, and an assistant professor at WSB Merito University Poznań in Poland. Some scientists think of a career path as being set in stone, following a ...