Laser Level Video
A regular bubble level, torpedo level or a electronic level works well for small projects, but they have limitations due to their length. Every time you have to move the level, there is a chance for error.
The new laser levels can project a line from ten to thirty feet. Most of the laser levels have an adjustable base so you can level it. Once it is level and at the right height, it projects a line onto the wall. A laser level can also project a line around a corner. There is also a wall mounting base. Camera tripods work fine for holding the laser.
This tool is not only fun, but user friendly as well. The laser can be harmful to your eyes so use the tool properly.