Quality Slimming

Very important and common area of mistakes. When we slim the size of an image, we don't generally include the quality aspect. Size reduction of image is by the size of image (length & width), it reduces the file size too, however we can also reduce the size of file by reducing the quality of image (Color depth). Mostly all software programs do both (picasa being worst). They would reduce the width and length and reduce the jpg quality without asking further details. You will get pretty small size making email servers happy, but the photo quality will be very bad.

Make sure when you reduce the length and width of picture, you do not go overboard with quality of jpg to reduce the file size. Photoshop gives very good options and another hidden option is well explained here.

http://photonaturalist.net/how-to-resize-your-photos-the-sharp-way/

Enjoy quality slimming down.