How to name your image files.

You should name all of you image files to help google know what the file is and also to help you know what file is what, when you are looking through your directory. If its a logo, please be accurate and say its a logo, i.e  websitename-header-logo.jpg

Use lowercase in all your file names, its professional!

Do not keyword stuff your image file names, be as accurate as possible, seperating your words with a - 

i.e  man-fishing-pond.jpg    Do not use spaces, I have been told that it makes the server insecure.