Master and Customize Column Widths in OS X Finder

Snow Leopard’s Column view is often the smarter way to look at your files, but having to drag around your columns constantly to see long file names is a pain. Macworld offers a handy, tucked-away option for fixing Finder’s widths. Double-clicking on the handle at the bottom right of a column will quickly resize the column to fit the widest file name. Holding Option while dragging a column width sets that custom width for every future Finder window. But you can fix all your columns at once with a right-click — via lifehacker