A client recently asked us for help with a very specific issue. The node edit page was hanging up, but only in Internet Explorer 10, and not in Firefox or Chrome. The client had WYSIWYG editor enabled.
One of the Drupal 8 initiatives that really excites me is Web Services. Drupal has never been easy to work with as a web service, but all that is about to change!
On a community website, it's a good idea to send some type of follow-up email a week or month after a user registers. This email can be used to ask for feedback or promote useful features.