ready4mouse: One thing you could do is get more familiar with the movies that are featured in the parks again.
The Mummy movies, Jaws, Twister, Jurassic Park, Blues Bros., Shrek, Terminator, E.T., An American Tail, etc.
OP - I was in the same boat as you. I couldn't figure out how to "plan" Universal! It is such an easy park to do but despite everything I read, I didn't get it until I was there

I agree about watching some movies. I found it odd/funny trying to explain the ET attraction to my 7 yr old. Not sure why 10 yr old didn't ask any questions

Jaws movie would have made that ride more fun (avoid the left side of the boat if you don't want wet feet!).
My 7 yr old loves dinos - I haven't seen Jurassic Park in ages but she now wants to see the movie. Would have been fun for her to see before hand (if appropriate, I can't remember).
My girls didn't understand MIB either.
They had just started watching Popeye reruns on (boomerang or cartoon network??) a few weeks before we left so that was a plus.
I will say they enjoyed all the attractions without knowing the movies/shows but it might have been more fun if they recognized them going into them.
I borrowed Walt Disney World with kids 2009 from the library and liked their Universal section that explain the rides.
A couple of areas I didn't really know about or thought the kids were too old for - that turned out to be fun - the ball zone at Curious George behind the Woody Woodpecker coaster and Seuss Landing.
Be sure to pick up a map when you get there. We got there at 9 and didn't know that some attractions didn't open til later (jaws was 10:30, ET was 11, etc).
I planned a US day then an IOA day but ended up splitting up day. Started at US, had lunch at Hard Rock then went to IOA. Started at IOA, had lunch at Mythos, went to US for the afternoon. Last day started at US, went to Bubba Gump, finished at IOA. It would be awesome if they had a tram/monorail or something between parks but the walk isn't bad.