There are a lot of aspects to consider for preparing media for a web site.  These references touch on a few, and are provided as a starting point.

http://hotwired.lycos.com/webmonkey/design/site_building/tutorials/tutorial2.html

This tutorial takes you through what you need to consider when preparing media.

http://www.pantos.org/atw/35305.html  More hints on optimizing your site for speed.

http://www.pantos.org/atw/35542.html

http://www.cns.pdx.edu/~millercr/imageht/intro.html Gives ideas on how to prepare graphics.

http://www.webdesignref.com/demos/demos11.htm  Demonstration of various graphic techniques that need to be taken into consideration for images on the web.

http://www.wpdfd.com/wpdgraph.htm  Another site discussing the differences in graphic medium.

 

Use this source to prepare a report of 100-150 words on preparation of media

Note:  You need to write in your own words.  Plagiarized material will not be accepted.