First off I want to say that the screening that is going on is a good thing. But...
It is making flying a pain in the rear. 10 hrs driving or 2-3 hrs getting to and through the airport, plus another couple of hours of flight time, and driving does not look so bad. OK it does, and flying is by far the most effecient and safest way to get to your distant destination.
Some observations from my past several flights.
Screening and checking you is vastly different from airport to airport. And this is with one federal agency overseeing the airport security. Portland Oregon seems to have the most checking of you and your luggage. The open a lot of checked luggage. They constantly rescan your carryon bags - remember your film is "good" for five passes through the x-ray machine. They may send your bag through the x-ray machine more times than that! Atlanta seems to have a normal and reasonable amount of checking going on. Phoenix was pretty hassel free, with reasonable screening - but the x-ray machine openings are smaller than most other airports. Bags you can use going through other airports may not fit here. Orlando just once wanted to see our photo ID and Salt Lake City NEVER once wanted to look at your photo ID. They did pull many people over to be checked before boarding.
Some Flying Tips
Don't overstuff your checked baggage. Pack loosely. You may have been able to squeeze everything in, but if your bag is selected for checking, the screener is not going to be that careful repacking and may not be able to get the bag closed.
Put all of your shoes in one checked bag. Most likely this will be the bag that gets checked. If you have shoes in all of your bags, all of them may be screened.
Going through x-ray:
Ladies take off your shoes. Every time. That is unless you like getting wanded and patted down. They will be checking your bra at that time too.
Put keys, coins, watches in a tray and send it through the x-ray machine.
Hold your arms out from your body. I have no idea why this makes it less likely for the x-ray machine to sound off, I just know that if I have my arms beside my body, I will be checked, if I hold them out in front of me a little ways the alarms don't go off. (I don't think I have any steel plates or screws in my body - but my wife and son think i have a few screws loose.

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Keep your film with you in your carryon bags and insist that it be hand checked. Sometimes your bag will be ran through the x-ray machine multiple times and sometimes will just sit for a long time in the machine (I don't know if its constantly under x-ray or not).
With the new warnings about cameras, laptops and other electronic devices, I would try to have no film in my camera when going through security because who knows what they are going to do while checking these now.
Happy Flying and don't let the terrorists win!!