Low Voltage Cable Runs:
Skip the Cat 5e. Go with Cat 6. Run at least 2 lines per box. Where you will have a TV or media center run 4-6 lines. To future proof. Place a line to anywhere you may want a camera in the future. Also factor in some ceiling boxes with Cat 6 in centralized locations if you ever go to a system that will use ceiling mounted access points for use with Ubiquity or other access points. Even if you don't terminate the runs make sure they are marked on both ends, so you know which cable is what for future termination.
Low Voltage Cable Runs:
Skip the Cat 5e. Go with Cat 6. Run at least 2 lines per box. Where you will have a TV or media center run 4-6 lines. To future proof. Place a line to anywhere you may want a camera in the future. Also factor in some ceiling boxes with Cat 6 in centralized locations if you ever go to a system that will use ceiling mounted access points for use with Ubiquity or other access points. Even if you don't terminate the runs make sure they are marked on both ends, so you know which cable is what for future termination.