Have an awesome time at Disneyland. If this is your first trip, remember to ask for your first visit buttons.
Like others have stated, be at the park at or before the time that it opens. Also, collect fast passes through out the day, for your must do ride attractions. The time that is stamped on the FP, is really more like a guideline, for it can be used beyond it's time stamp.
Most definitely visit the pirates, the Haunted Mansion, BTMRR, the Matterhorn, go on safari on the Jungle Cruise. And visit the Enchanted Tiki Room too. Say hello to Jose for me. And of course, do not forget to go on expedition with Indy. Just beware of the poisoned blow darts, and the ancient curse..... also... keep your head low, as bats sometimes like to land in your hair, so as to pull some of it out, so they can build their nests in their caves. Don't worry.... no one has lost their head since 1938, that I am aware of anyway.... for it is believed that the last of the head hunters had since turned vegan, and of course long before vegan became popular with some people.