OK, so we are all familiar with the bag check that we have to go through at the various Disney theme park. As someone who has gone through this many, many, many times, I had also been observing this process rather closely on many occasions. After all, as one is standing in a long line that is barely moving, what else is there to do?
So, here is my suggestion on how everyone who has a bag to bring into a Disney theme park (or any theme park that does a similar bag check) can help make the line move faster.
1. Use a bag that has the minimum number of pockets and compartments. The security person, if he/she is doing his job properly, will want to look inside each compartment and pocket. The more your bag has these things, the longer it will take for the bag check process to finish. A bag that has one big main compartment, and a smaller pocket, is often ideal.
2. Don't put another bag inside the your bag. I often seen smaller bags (purse?) being stuffed inside the bigger, carry-on bag. Again, the security person will want to see what's inside and will just take longer for the bag inspection to be done. If you have to carry a separate purse/bag inside your carry-on bag, take it out of the bag by the time you get to the inspection point. This will prevent you haven't to fish it out and open it.
3. Make sure your bag is open/unzipped by the time you get to the inspection point. This includes all pockets and compartments. This will prevent the security personnel from having to keep asking you to open/unzip various parts of your bag, especially if it has a lot of pockets and compartments.
4. This may be tough, but really, try to being as little as possible into the park. The more you pack your bags with stuff, the longer it will be to go through it.
Of course, I've assumed that you are going in without kids or strollers jam-packed with stuff, etc. If you are, then you're on your own and I hope to not be behind you at the bag check line! 
Zz.
No longer an active member.
having a bag that is organized is important. I try to have my teen DD do this too. Sometimes I have to bring in more with small kids, so I use zip bags to sort and organize my items: camera, ponchos, snacks, wipes...
exactly how I feel. No bag = no stress