Have you done any research on the main Ibiza-Spotlight website? Tons of info there.
Did you check the party calendar? Full list of events on there.
What are you into? I'll assume you like clubbing but what kind of music?
If it were me, I'd go to:
19 - Pure Pacha @ Pacha (w/ Basement Jaxx)
20 - either People from Ibiza @ Amnesia or Matinee @ Space (both happy house nights)
21 - We Love @ Space (big line-up. That's a must.)
Are you still there Monday night? I recommend Cocoon @ Amnesia
Spend an afternoon at Bora Bora, of course, but also get yourself out to another beach or two during the day. Lots of people talking about Cala Jondal this year, specifically the Blue Marlin beach club there. Ibiza Spotlight has a full beach guide.
Eating, try Moorea's right there in the Jet complex. Head over to the Dalt Vila (Ibiza's old town) one evening, have a walk around, get a bite to eat at La Oliva. If you've got time, maybe on Saturday, head to Cafe Mambo in San Antonio and enjoy the famous sunset.