Lightroom :: Apply Image Adjustment To All Files In Folder?

How do I apply an edit to every file in a folder?  Every time I need to do this, I end up flailing around for 10 minutes before I can finally get it to work.  Or, sometimes I give up and manually paste the copied settings to each file one at a time.  It seems a no-brainer that "copy settings" followed by "paste settings" to all files selected would do the trick.  Or "copy settings" foillowed by "Sync settings."  But it doesn't work.