What software are you using to edit your pictures?

Gimp and others will allow you to resize, your images.

Or, you can do simple editing and resizing online. Photo Bucket
www.photobucket.com and Flickr www.flickr.com both allow resizing of images
as well as other editing.

If you are working from a dial-up location, likely you are better off
downloading free softwware like Gimp. If you have broadband, then doing it
online may be easist for you till you have time to select and learn a photo
editing program.