I've created a google spreadsheet to catalog all the submitted stories where you can add your username and keep track of which stories you've comment on and which ones you need to get to. 

https://docs.google.com/spreadsheets/d/16Ni_aL5Qlr-hHTNshJ6xwLZVtV8kPw_V6r6hgtToxus/edit?usp=sharing

When you submit a story, your username will be automatically added to the commentors list and an "x" is added in the cell where your story and your username overlap, because obviously you can't comment on your own story lol. 

Even if you don't submit a story, but want to make sure you leave comments on everyone's stories to support everyone, feel free to add your username and keep track of which stories you've read and commented on :)

And if the link doesn't work for you, comment or pm me your gmail and I'll share the sheet directly with you.