First off, here is a little goblet I did while practicing using the revolve tool. I drew half a curve and revolved it around the y-axis, added a couple textures/colors, and there you have it:
And here is a logo I did for the Texas Historical Association that I am a member of. We publish the Texas Almanac every two years.
To make the logo, I traced the blue star in the original with the curves tool, enclosed them, extruded the curves and added color. The white piece in the back is an extruded plane. In all, there are 5 pieces.