Laptop + power supply
Digital Camera
8 AA batteries
bluetooth adapter x2 + power supplies
binoculars
spare laptop battery
scanning radio receiver
GPS
portable numeric keypad
USB hub
mini optical mouse
laptop CD drive
portable DVD player
cell phone
misc cables and adapters

Only time I ever had a problem was when I accidentally left a screwdriver in the bag. It was confiscated. No other issues before or since. Only about one out of five times do they even take an extra moment to look at it on the X-ray screen.