There is much more...
1. Banana Island
2. Fort Zubara
3. Al Khor community
4. Desert safari
5. Clubbing
6. Souq Watif (Enjoy the rich hospitality of food & sheesha)
7. The Islamic Museum (Better rush, they would be closing it down soon)
8. The Pearl
9. Losail
etc....

You gotta b in the right place to know the right things to do :)