A lot of great tips are on here for you already, but for any specifics I highly recommend the Disneyland forum- there are a lot of us California Disneyland crazies that are willing to help
Keep in mind that the parks are so close that park hopping is a breeze and a lot faster than in Disney World. I recommend spending your mornings in Disneyland and then hopping over to California Adventure in the afternoon when Disneyland gets more crowded. I don't know if when you are there is mid week or weekend, but weekdays in October should be nice, weekends are always up in the air.
The only things that get crowded in Fantasyland are Peter Pan (the most crowded, and the slowest queue), the Matterhorn and Dumbo. I would suggest doing the e-ticket attractions first or the submarines, or do the submarines very late at night when the park is about to close. And you will have your own entry to the California Adventure park in the morning since you are staying at the Grand Californian, so you'll get in right away...and I am sorry to say that the rope drops in the DLR aren't as exciting as the ones in WDW...there is no little song and dance beforehand, but I still get excited.
Relax and have fun. Disneyland definitely doesn't require as much intense planning as WDW. Make sure to see the Aladdin show in California Adventure, I am sure it will be a highlight of the trip.
Happy Honeymooning!
Im pretty sure the hyperion theater is going to be in rehab while we are there..does that mean no aladdin?
How are Mickey's trick or treat parties are they worth going to?