You should have a list to the right that lists all of the questions that you are subscibed to.
If you're sick of a certain question and want to give your inbox a break, then simply Unsubscribe...
Hope this helped
I find it can be annoying as the system notifies you that an answer has been posted to a thread you have subscribed to and when you go to the thread to read it you find the last post was the comment you added yourself.