My plan around Tokyo

Hi..would be most pleased if someone could advise me on which areas I should combine to visit on a particular day. I will be spending 6 days in Tokyo in May 2012.

These are the areas I plan to visit

1. Akihibara
2. Sensoji Temple
3. Ueno Park
4. Ginza (nite)
5. Shinjuku Gyoen Park
6. Meiji Shrine
7. Chidorigafuchi Cherry Blossoms
8. Tsukiji Market
9. Chinzanzo Park
10. Tokyo Metropolitan Govt Office Building
11. Asakusa
12. Yoyogi Park
13. Shimokitazawa (Old Tokyo)
14. Tokyo Sea Life Aquarium

Pls help me decide which areas I could do in a day or a portion of a day so I wont be doubling back and forth.

Appreciate if you can let me know if I have left out anything major to see in Tokyo.

Thanks a million

I'm on the train to work, so I'll keep it short. Just off the bat,

1, 2, 3, 11 are relatively close
5, 6, 10, 12 are relatively close

Here is some suggested groupings:

11. Asakusa
2. Sensoji Temple
3. Ueno Park

5. Shinjuku Gyoen Park
6. Meiji Shrine
10. Tokyo Metropolitan Govt Office Building
12. Yoyogi Park

1. Akihibara
4. Ginza (nite)
8. Tsukiji Market
7. Chidorigafuchi Cherry Blossoms

Thanks John and Uji. Appreciate your help on this

Ray