On a new document type your text. Select the type with the Direct Selection tool (this is the second arrow on the pallet over on the left hand side with the arrow tip filled in white). Go to Effect, 3D, Extrude & Bevel. Check the preview box and move that big box around. You’ll be able to see how your text will look without accepting the changes this way. Choose a custom color and you have just created your Custom 3D Text! See examples below:
Click to enlarge
And here is the final(Click to enlarge)
It's The Future Marketing 