Can someone tell me (in titles) the really big Tony/Ziva moments of season 6 and 7 that every Tiva shipper should know?

Gosh sweetie there are so many! I suggest 你 look in the 论坛 there is a thread in there called the Tiva Quiz. All the girls left their fav moments from all seasons and lots of other info. There are other threads that may help in the 论坛 too.

Just know that Season 6 is quite dramatic and angstyfor them with lots of cute moments and Season 7 totally proves the 爱情 they have for each other. :)