On Dec 14, 2:56*am, "Bill" wrote:

I use those Black and Decker Laser Level things. They work reasonably
well.

Where I need more than one fastener to hang something, I will mark
(and drive a finish nail temporarily) or position the first fastener
and lay the (ordinary 4' level) upon it to locate the next fastener -
repeating as necessary. Then, using a line between the first and last
marks, "measure twice" or double check my work.