Should one use style sheets for instance:

1) Links
2) Text
3) Images
4) Paragraphs

Or should one use just one stylesheet for the whole site?

I will be using css for an online ordering system and website for a photographer.

Cheers

Any page that is only text I would use a single style sheet. But they will have all same characteristics. Anything such as links I would use another style sheet because there is different complications.

Common practice is to use a single style sheet. However for larger sites this gets to be a real pain as the style sheet quickly grows. To make management easier you could break them up into separate logical groups and then either include all of them in your HTML or use the @import to create a master CSS and include just that master style sheet in your HTML.

HTH.