So the thing I LOVE about Universal is that we did NO PLANNING. To put that into perspective - I plan like a fool at WDW. Hmmm I wonder why I now like Universal better - let me think.
So there are many ways to slice this pie (mmmm pie) and it come down to what you / your group likes and also the weather. The great thing is that that parks are SO CLOSE together - that you can change your mind no problem. Also - is Volcano Bay (or whatever it is called) part of your tickets - I think it is - so don't forget about that.
Also the onsite hotels are VERY CLOSE so getting back to the hotel is not a hassle at all and the boats are always running.
A few thoughts
1 - You can do all the WATER rides - Jurasic park, Popeye's, etc and then head back to the hotel if the weather is warm. I HIGHLY recommend that if these rides are on your list - you lump them all together (luckily they are all close together) at the end of your day and then not worry about drying off. They do have dryers - but there is a line and they are $$ and you still have soggy underbits. You WILL get wet - it doesn't matter how much you close your eyes and grip tightly - you still get wet, soaked, drenched. But they are fun.
2 - The express pass is awesome - we didn't plan a thing other than getting to HP first thing. Although now the Express Passes work there as well - so take advantage of it. We just started at one place and worked our way around. We didn't want to do Sues Landing - but once we got there we did it and it was fun. With you age kids they will like it
3 - if you like a ride - ride it again. We did MIB like 4 times in a row (saw a lot of the plebes in line a few times - ha)
4 - we just started at point A (usually HB) and worked our way around the parks.
5 - Take Hogwarts Express both ways
6 - Try Mythos for a meal. Our first day we had lunch at Woody Woodpecker's crap O'rama counter service - ok that wasn't the name - but it should be. The next day we wondered into Mythos. OMG - what a difference - it was SO much nicer - and not any more expensive. Now this is not a quick in / quick out. Service was good - but not super fast. But it was a nice meal, reasonably priced and we had a moment to sit and talk as a family (yuck!!!). No it was nice and it is right outside of HP on the IOA side.
7 - Make time to meander - especially in HP. Go to Olivanders in Diagon Alley and do the wand ceremony (if the line isn't too long). Grab Butterbeer soft serve and cop a squat on the steps and Muggle watch. ENJOY the atmosphere there. It is amazing. We actually did the LONDON STUDIOS tour (which was awesome) but kept comparing it to universal studios. In London you got to see the "real" stuff - but in US - you were in the middle of it all.
So a long winded answer to your short question.
To summarize - just follow your nose and enjoy the time with your kiddies.