Select the 'Subscriptions' tab to find a list of all your subscriptions. If you wish to unsubscribe from something then select the 'Unsubscribe' button. 

Make sure you save any changes you make, by selecting the 'Save' button at the bottom of the page. 

If you unsubscribe from something but want to resubscribe then you will have to go back into that application (forum, blog etc.) and select the subscribe button. 

Notifications

Select the 'Notifications' tab to find a list of possible notifications. 

If you would like to receive a notification about an item make sure the notification box is ticked on the left-hand side of the page. If you would also like an email notification for that item too, then make sure the email box is ticked on the right-hand side. If you untick a box on the left then the email notification (on the right) will automatically untick. 

Make sure you save any changes you make, by selecting the 'Save' button at the bottom of the page.