Best use of pictures on site?

[av8erab]

I am going to redesign a site in CSS that I am slowly learning. I may even try to go tableless.

The picture contains many jpg images. What is the best way to design the site with these pictures? Should I use thumbnails, etc.

I am trying to make it search engine friendly but yet display the pictures well.

Thanks

[angelos]

What do you mean to make 'em search engine friendly in this context?