There are two lines outside of the entrance to Indiana Jones right by the water in front of the dinosaur ice cream stand. Basically you will choose the person whose autograph you want the most. Get in their line. They will start to hand out the wrist bands at 9:30. You could try to get into the second line to get another wristband, but you will have to be near the front since they only give out 120 definite bands for each day. You get a number and time and show up 15 minutes before your session starts. I got to the park before opening, since there is a nice little preshow with the stormtroopers on top of the gates. We were one of the first people in the parks and got bands 12-15 for the first person, first session and #60, standbys 1-3 for the second person, second session. There is no point in going over there unless you have a wrist band. They don't take all the standbys, so anyone else is out of luck. They were only signing the Disney provided pictures so bringing anything else would be a waste. Basically, you have to get there early and be prepared to wait. If you have more than one person and only need one autograph, split up into the different lines and get them that way. You can take your own pictures, but some of the actors are quite personable and others are not. It really depends on the person. Did I cover everything?
ears2ya - The Jedi training has kids selected out of the audience in front of the stage. Get there early to be in the front. These kids also get to walk in the morning parade. The kids trivia has a signup at the info table that limits the number of kids that can participate. The kids I saw for the Jedi training were all really young (less than 8 years old). Most were about 4 or 5. I think they picked 10 or so kids for each session.