Use your camera to capture and use motion blur creatively by panning the camera or having a subject move through a long exposure(thanks Inga M.). We often use PS/Processing to create motion blur but lets do it the PURE way. Just make it about the motion as captured.
Helpful hints:
(1) Pan a fast moving object and find the blur in the passing back ground while keeping the subject more clear.
(2) Use the panning to paint a scene with motion. (Look for strong horizontal or vertical element that will be accentuated by the motion)
(3) Use a steady camera to capture and use a subject's movement over a longer exposure with other elements remaining steady.
This should involve so good experimentation. Have FUN!
“What is mind but motion in the intellectual sphere?”
-Oscar Wilde (Irish Poet, Novelist, Dramatist and Critic, 1854-1900)

(link to guidelines if needed)
Scott (for Walter and Scott)