Answer: You can keep a list of the forums you visit, including their recent activity, by using the Subscription feature. This is located toward the top of each forum, below the subforums and above the topics list. Click on the Forum Tools, then select Subscribe to This Forum.
You will be given the option to add an email subscription to the forum, giving you daily or weekly notifications of the posts made. You do NOT need to have an email subscription; if you would rather not receive emails, you can leave it on No email notification and just click the Add Subscription button.
Once you have subscribed, the forum will be listed on the front page of your User CP! You can subscribe to each forum you visit, and they will all be shown in your User CP for you to easily follow.