This is what I do to save for web:
If you're using Photoshop Elements, this action is the quickest, easiest way to save for web (and it's only $1 through the 25th...SO worth it!!):
http://www.scraps-n-pieces.com/store...oducts_id=4339
Once you run the action, then click -->File -->Save for web. You'll get a pop up box. In the upper right corner are 3 lines. Click there -->Optimize File Size Then you'll get another pop up box. I usually put 247k in there so it's always set & ready to save.
Hope this helps!