Displaying the Flag Outdoors
When the flag is displayed from a staff projecting from a window, balcony, or a building, the union should be at the peak of the staff unless the flag is at half staff.
When it is displayed from the same flagpole with another flag - of a state, community, society or Scout unit - the flag of the United States must always be at the top except that the church pennant may be flown above the flag during church services for Navy personnel when conducted by a Naval chaplain on a ship at sea.
When the flag is displayed over a street, it should be hung vertically, with the union to the north or east. If the flag is suspended over a sidewalk, the flag's union should be farthest from the building.
When flown with flags of states, communities, or societies on separate flag poles which are of the same height and in a straight line, the flag of the United States is always placed in the position of honor - to its own right.
..The other flags may be smaller but none may be larger.
..No other flag ever should be placed above it.
..The flag of the United States is always the first flag raised and the last to be lowered.
When flown with the national banner of other countries, each flag must be displayed from a separate pole of the same height. Each flag should be the same size. They should be raised and lowered simultaneously. The flag of one nation may not be displayed above that of another nation.
Raising and Lowering the Flag
The flag should be raised briskly and lowered slowly and ceremoniously. Ordinarily it should be displayed only between sunrise and sunset. It should be illuminated if displayed at night.
The flag of the United States of America is saluted as it is hoisted and lowered. The salute is held until the flag is unsnapped from the halyard or through the last note of music, whichever is the longest.
Excerpts taken from http://www.usflag.org/