If you do not have a photo editing program or software on your computer, and you do not want to join phtobucket, then try this online editor. It's very simple.
Online Photo Editor:
http://pixlr.com/editor/Go to this page, open the photo of your choice "From Your Computer", click "Image" on the upper menu, then click "Image Size", then reset the image size. Next click "File" on the top menu, then click "Save", a popup will show, I selected to save as a jpg file, then click "OK" on the popup, next give the photo a new name and save it in the file of your choice.
This photo was resized in less than a minute.