With all the content that you can follow in the IPS community suite, it is important that you can manage this easily and in one place. You can manage your followed content in this way by selecting your name in the top right, then selecting "Manage Followed Content"
When clicking on this option, you will be presented with the following screen. You will notice that you can filter through different types of content using the menu on the left of the page
To change the way in which you follow (or indeed remove completely) you can select the Change Preference button provided next to a given item. This will then present you with the various options you can change.
In addition to this method, you can also do this with multiple items at once. To do this, you select the checkboxes next to each item that you want to change. On clicking one or more of these checkboxes, you will be shown a menu at the bottom of the screen to change the options as you wish. This is shown in the screenshot below.