When you go to save as jpg, click on Options.
Then under JPEG/GIF, you will see JPEG save quality.
Run the save quality down to about 60.
Then save as jpg.
You will then see the file size cut considerably.
If you want a free image program that can help you, called Irfanview, e-mail me and I will send you a URL to download it, along with several other free programs.
tm(at)batauto(dot)com
Have fun.