As seen in Github Flavoured Markdown (https://github.com/blog/1375-task-lists-in-gfm-issues-pulls-comments), inline task lists would be handy for managing the 'micro-tasks' that go with any ticket. This could also be used as a checklist for agile development story tickets, e.g.
As a user, I want to sign into my account to see my private stuff
[x] User can sign in using username and password
[x] User can sign in using email address and password
[ ] User can navigate to the Registration screen to register an account (#86)
[ ] ...
Additionally, a report could be added to list unfinished to-dos grouped by ticket (assigned to you).
Complete We've implemented this suggestion!