Send a daily reminder email when an issue is past it's due date: Use schedule trigger firing every day with "duedate < now() and resolution = Unresolved" JQL and then send email action.
Delete issues that haven't been updated in a month that haven't been started: Use schedule trigger firing every month with "updatedDate < startOfDay(-1m) AND status = Open" and then delete issue action.
Add a watcher when an issue is transitioned into review: Use the issue event trigger with "Issue Transitioned" and "status = Review" JQL and then the add watchers action.
Comment on issues that are resolved without work logged: Use issue event trigger with "Issue Resolved" and "timespent is EMPTY" JQL and then the comment issue action.
Delete all attachments from task-type tickets when the issue is closed: Use issue event trigger with "Issue Transitioned and "status = Closed" JQL and then the delete all attachments action.
Automatically watch issues based on JQL criteria
Watch for certain issue patterns with JQL and email a user if they're created.
Send email for high priority issues (it would be cool if we could add text message support).
Send reminders if issues have been in a certain state for too long. Like if an issue has been in-review for over a month, send a reminder.
I'd like to be able to auto transition issues depending on the issue state in Bitbucket.