Use the blend to add dimension to your text.

1.The first thing I had to do was draw a curve, and select the Pen Tool, and draw a smooth curve.

2. the Path-Type Tool by click on the curve. Then typed away.
w/ the Selection Tool, i Changed the color of my type to bright pinkish/purple.

3. made a copy of the type, set the copy a little down bellow the original text. Changed the copy's color to dark purple, and send it to back.
4. selected both the original type and the copied text. Double clicked on the Blend Tool

5. clicked on exactly the same points on both the original type and the copy (for example clicked on the lowermost anchor point on S on both types, and done! I now have 3-D type

http://www.tutorialguide.net/3d_text_tutorial.html