Use the underscore character (“_”) to separate filename chunks. Use the short dash (“-”) character to concatenate elements within a filename chunk
Use a meaningful name, having the following questions in mind: when, what, who, where (you may use these selectively according to the image category, file name length etc.)
Use the date of creation of the file as a prefix in the format YYMM (no need to add the day)
Use abbreviations instead of the full names
For multiple files with the same name (e.g. a collection of photos from an event taken on the same day) add a serial number at the end of the name in the following format: _01
Use a short title, try not to exceed 30 characters