Here's a couple of other suggestions:
When you subscribe to a thread, change the Notification Type from "Daily updates by email" to "no email notification". This will totally eliminate all the emails, which can be overwhelming. You'll still be subscribed to the thread, you just won't get emails. So how will you know when there's an update? That leads me to my next suggestion.
Change your Airforums bookmark to your User CP. This is how I have mine bookmarked:
https://www.airforums.com/forums/usercp.php
When I click on the link, any subscribed threads which have been updated since my last visit are listed at top. Subscribed Forums (if any) are listed next.
Hint: If you click on the thread link, you go to Page 1 Post 1 of that thread. Better to click on the last page of the thread or LAST to quickly go to unread posts (scroll to bottom of page). Or better yet, under the "Last Post" column, click on the little arrow to view the last post. At that point, I typically read from the bottom up to get caught up on unread posts.