To see a summary of the latest activities of every project on the My Projects page, show the projects in the List view. You can click on the changes in the list to go to the details of the issue in question.
The Dashboard page inside a project will provide a more comprehensive list of the most recent changes.
To follow the last changes to all issues which are assigned to you, follow these steps:
Go to the Issues page of your project
Choose the 'Show activities' mode by clicking on the button
Click on 'Filter' to show the filter options
Select yourself in the 'Assigned to' list
You also have the possibility to filter the issues for a certain period of time, type, or action taken
You will now have an overview of all actions that have been taken on the issues assigned to you.
You also have the possibility to sort the displayed issues by clicking any of the column headers, apart from the column 'Changes'