You can do this as many nights from as many locations as you please. Or just do it once and enjoy contributing to a world wide environmental science project. The Globe at Night will integrate all of the data into a map of sky brightness around the world which will be viewable from the project's web site. This should just take a few minutes a night and will give you a chance to become familiar with one of the oldest and most beautiful constellations in the heavens.
Do this project with your children or your class, if you are a teacher. Sky brightness can vary widely over a small area, so you can compile your own map of local sky brightness. You can use it to keep track of the growing threat of light pollution in your community and even use it for an action agenda to help mitigate the effects of light pollution.
And while engaged in this project, you won't have to remember to Keep on looking up!
Globe at Night reports from 2010