TSA.gov Tips for Traveling:

• Pack an organized carry-on bag using layers-a layer of clothing, then electronics, more clothes, and then any other items. This will help the transportation security officers see what's in your bag. Innocent items can actually appear to be potential threats in an x-ray image, simply by the way they're packed. Wrap cords and tie them neatly with a twist tie or a zip tie.
• 3-1-1 for carry-on. If you're taking any gels or liquids with you make sure they are less than 3.4 ounces. Place all liquids in a 1 quart-sized, clear, plastic, zip-top bag; 1 bag per passenger. Must be placed in the screening bin separate from carry-on bag.
• Wear slip on shoes so it is easier to slip them off to place in the screening bin. 
• Have your jacket off while in line so you can quickly place it in a screening bin.
• Come early and be patient.
• Declare larger liquids, medications, baby formula these items must be inspected.
• Remove items that may set off the metal detector and place in a bin. These items may include: keys, loose change, mobile phones, pagers, heavy jewelry, clothing with metal buttons, snaps or studs, metal hair barrettes, belt buckles, body piercings.