This is for Microsoft computers. Click once on an image icon in a folder. That will highlight it but not open it. Then keep the mouse cursor over the image. The pixel count will display along with the date the picture was shot. I use that trick all the time.
I sort pictures in sub-directories, or folders. The main folder is simply "Photos." At home my sub-directories under Photos are the years 2010, 2011, 2012, etc. I have many photo sub-directories at Paragon. I could never stay organized without them. I never keep anything in Microsoft's default "My Documents" or "My Photos." Directories and sub-directories are on the main hard drive, which in my case is d:\.
Paragon Industries, L.P., Mesquite, Texas USA
firstname.lastname@example.org / www.paragonweb.com