^^
This, i have it sent to my phone so i can reply within 1 min of seeing it,
(note when you post there is the subscription options)
to set it as default go
USER CP
edit options
then
Default Thread Subscription Mode
When you post a new thread, or reply to a topic, you can choose to automatically add that thread to your list of subscribed threads, with the option to receive email notification of new replies to that thread.
Default Thread Subscription Mode: instant emailnotification