Hello! I've been to
Disneyland 5 times and I just got back from a Disneyland trip on Monday, so I can give you LOTS of tips!
If you're going to buy ears, they have a huge ears hat shop in Fantasyland, so wait until you go there to pick you ears. The shop is called "Mad Hatters".
The Grand Californian has an entrance to California Adventure only for people staying at the resort hotels that drops off at Grizzly River Run.. UTILIZE THE ENTRANCE! Also, The Grand Californian is only about a 5 minute walk through Downtown Disney to get to Disneyland and California Adventure entrances! BTW, Disneyland is way different from Disney World, California Adventure and Disneyland are right across from each other!
Um.. White Water Snacks in the Grand Californian is the main snack place but just like every other snack or restaurant in the parks, it doesn't open until 7, so you'll have to wait to get breakfast if you're going to Magic Morning. SPEAKING OF BREAKFAST, I think it's the same for Grand Californian, I stayed in the Disneyland Hotel, you have to leave the provided menu hanger thingy on your door with your breakfast choice by 12 AM if you want room service in the morning. Weird.. but I was really disappointed in the morning when I couldn't get breakfast so remember that!
I'm sure you know this, but go straight to Cars Land and wait for fastpasses for Radiator Springs Racers when you go to the California Adventure Magic Morning. Also, the line for the fastpasses may seem like it's not moving and that's because.. it's not! They don't let you get fastpasses until the whole park opens at 8, but its worth waiting because once the line starts moving at 8, it only takes about 5-10 minutes to grab some fastpasses.
Um.. if you really enjoy LeFou's Brew at Gaston's Tavern, the Red Apple Freeze at the Cozy Cone Motel is the same thing. TRY THE CHILI CONE QUESO AT THE COZY CONE MOTEL. JUST DO IT.
Toy Story Mania is not as big of a deal as it is at Disney World and has almost no wait in the morning. Um.. check the places that have fastpasses because you'll be surprised at how low the number of attractions that have fastpasses are.
Other than that, HAVE FUN! I've also been to Disney World and Disneyland but I prefer Disneyland, so I hope you love it!