We are doing Universal at Spring Break (Easter week!!) I know pretty much nothing about Universal. We are staying onsite so we will get early entry and Express Pass. Other than vague Harry Potter notions, I don't know anything that is there or what to run to/ what to skip... Strange feeling for me after being a Disney 'expert' for many years.
Should I subscribe to Touring Plans or another site? Should I just wing it? Is there a great site for research? what does anyone recommend?
I've done many trips to Disney, I'm an expert on going through touringplans, booking fastpasses, booking dining, creating a schedule.
Then I did a few days at Universal this past July 4th weekend... Had early entry and express pass...
Guess what --- You don't need more than a vague plan. It's not Disney.
Just get a general sense of what rides and shows you want to see, and do them.
Use early entry or late evening for the Harry Potter stuff. Despicable Me could also benefit from being done in Early Entry.
Otherwise, just do the rides and activities you want, in the order you want to do them, with some common sense. Common sense being that the park will be more crowded from 11am to 5pm. Even with express pass, may want to plan your rides around mornings and evenings, just like Disney.
Dining? Never found the need for an advanced reservation.
Everything else said here is right on. The water rides are VERY wet. And if it's hot, the lines can be long even with express pass during the mid-day. But late morning, they will be fine with express pass.
Harry Potter is best done during early entry, BUT... make sure you spend time in Diagon Alley at night. It really looks amazing at night. And in the hour before park close, the lines at the Harry Potter rides are pretty reasonable.
Compared to planning for Disney, Universal is easy.