My biggest tip would be to know the rides that are really slow loading and/or have horrible wait times, so you can plan accordingly....
Fantasyland: Peter Pan, Alice & Mr. Toad (with Peter Pan being the worst) will normally get busy right away in the morning & stay steady all day long. Casey Junior, Storybook Land Canal Boats & Dumbo can also get bad because the capacity is fairly limited. Matterhorn will get a very long line, but don't be fooled. With two tracks the line actually moves really fast. We've been a couple of times where the posted wait time was 45 minutes, but I don't think we waited anymore than 30.
Tomorrowland: Space Mountain is always popular, but has gotten even more busy due to the Hyperspace Mountain overlay & FP will go quickly. The submarines are another that loads very slowly, so the line tends to stay long all day. Star Tours is normally much busier at DL, than at WDW. If you happen to pick up a FP for Star Tours be sure to grab one for Astro Blasters while you're there. Those machines are just to the left of the Star Tours ones & they're not linked to the rest of the FP system. So, you can have an Astro Blasters FP while holding another.
Adventureland: Indy, Indy, Indy! It's consistently one of the most popular rides in the park & tends to break down quite a bit. FP is your friend for Indy. It also has single rider, but I don't think it works well on that ride. The time I tried using it, I think we waited longer than it we would have going through the queue. And that was with a short single rider line.
Frontierland: Big Thunder is really the only attraction left open while all the construction is underway for Star Wars Land. Normally the wait isn't really that bad, but with so much in that area being closed, it might be busier for a while.
New Orleans Square: Normally the wait isn't too extreme for anything unless it's a very crowded day. I'm sure you know this, but you have to do Pirates! It's so much better at DL!
Critter Country: Of course Splash can get bad, especially if you go when it's hot. But, I feel like the wait times at DL normally stay more manageable that WDW.
Toontown: Roger Rabbit can get a pretty decent wait going sometimes, but it does have FP if it's a really bad day.
For DCA, I'm not going to bother to break down by land. Radiator Springs Racers of course. This is a must to do either first thing in the morning or get a FP. FP will run out a few hours after park opening, so don't wait too long. Midway Mania gets busy, but nowhere near as bad as at WDW. Keep in mind that there isn't a FP available for it though. I'm not much into thrill rides, so I never go on Tower of Terror or California Screamin', but most people love them, so they get busy. Last, but not least, Mickey's Death Wheel. I don't honestly know if the lines get bad because I don't normally walk by it, but it seems like it would load very slow. I've heard many of the bravest people I've ever met, say this ride terrified them more than anything...ever. Grown men that admitted to crying like a baby on the ride. If you're thrill seekers, you may not want to miss it.
Most importantly have fun! You'll love Disneyland!