I would suggest buying a powerpass, which is an annual pass with certain blackout days:
2-Park Annual Power Pass
Enjoy 1-year admission* to both Universal Studios® and Islands of Adventure!
$109.95
or a preferred annual pass:
2-Park Preferred Annual Pass
365 Days of unlimited admission to Universal Studios and Islands of Adventure with NO Blackout Dates! FREE Self Parking. Select discounts on food and merchandise. Plus over 2 dozen more discounts.
All Guests $169.95
Bev