The best way to do this, in my opinion, is simple: leave notes on everything. In other words, try to give the writer your play-by-play reaction to every part of their piece.
How to give (and get) amazing writing feedback
Nathan Bashaw

Since Medium removed comments it’s more difficult for people to leave notes as they read. What form do you send people your writing to get feedback — google docs?

One clap, two clap, three clap, forty?

By clapping more or less, you can signal to us which stories really stand out.