9. Only revive "dead" topics if you have something new or valuable to add.
A thread is considered "dead" after two weeks without a new post. You may revive any dead thread within 6 months of the last post without consequence as long as you have something completely new or valuable to add to the discussion. What is considered new or valuable to the thread is determined by the moderating team, so make sure it's a good post if you're going to revive a thread!