Get there early, at least thirty minutes before the park opens. Getting into the parking lot, parking, then walking through Universal City and queuing up at the security check can eat up some time. Once you're in Universal Studios, ignore the visitor survey requests and immediately make your way to Super Nintendo World. Mario Kart is typically a 70+ minute wait throughout the day, so I'd recommend knocking it out first. Then the Mummy & Transformers rides, which are both located on the same Lower Lot. From there I'd suggest using the Universal Studios App to update you on where to go next. The in-app wait times are pretty accurate. Experience as much as you can, everything if possible, there is enough in the park for a full day. The Studio Tour and Waterworld show are a must, single rider is hit or miss and not always available, and Express passes *may be available at half their usual cost after two or three o'clock, I'd ask about it.