Your recent activity gets updated if you do one of the following:
1. Post a class
2. Post an event
3. Post a place
4. Start a group
5. Start a topic
6. Register for a class
7. Get on guest list for an event
8. Rate a place which implies you've been there (just click on the
number of stars you want to give it)
9. Join a group (that's why you have the "Nepal Minimalist Design
Fans" in your profile)
10. Subscribe to a topic (not yet implemented)