Be prolific
I'm reasonably sure that it was a pottery class (or study) in which students/study participants were asked to produce either the best piece they could think of or as many as possible. I think it was actually a study that I read about.It might need some internet sleuthing to find it. I'll try later.I do not think that it is surprising that practice improves skills though (well, except for people with an exceptionally fixed mindset ;).(For today's lucky Ten Thousand, "fixed mindset" refers to https://en.wikipedia.org/wiki/Mindset#Fixed_and_Growth_Minds... )(For today's lucky Ten Thousand, "today's lucky Ten Thousand" refers to 
https://xkcd.com/1053/ )