The Bokeh effect is created using a narrow depth of field. That is a function of aperture, focal length, and distance to subject.
[On a Canon SX20IS] You want a large aperture opening (small number ie F5.7 at full zoom), Full (20X) zoom, and a minimal distance to the subject (3.2 minimum focus distance at full zoom).
Shoot in aperture priority mode (Av).” —Flickr: Discussing Blur, Bokeh, How to? in Canon PowerShot SX20 IS
Manually Setting white balance on a Canon Powershot:
3.By using the SCROLL WHEEL scroll right. The last icon as you are scrolling right is the MANUALLY SELECT WHITE BALANCE icon.
» At this point, while you are still in the function menu, on the manual white balance button, point the lens at a neutral value color, such as a white copy paper, to fill the screen.
4. Press the DISP button to balance the color using that available light.
Once you are done with that shot, set the white balance function back to auto.” —Flickr: Discussing Manually Setting White Balance in Canon PowerShot SX20 IS