Bokeh photography: Manually focus everything so the lights in the background are out of focus, and the subject (if there is one) is in focus. Also keep a small depth-of-field with a small aperture so the background is easily blurred (motion blur)
These awesome photos by German photographer Christopher Hassler, shot in a tunnel using a fisheye lens, have such a convincing tweaked perspective that they might just test the mettle of acrophobic viewers.
This image is so creative using the flower as a tutu. I like how the colors in this image are very warm and there is a little bit of orange in the flower. It helps the image how the flower is in focus but everything else is blurry.
VALUE Toast gradient. Human eyes can perceive 255 distinct levels of values (shading). If someone can find toast with 15 different levels, surely you can have more than just 3 or 4 in your drawings and paintings.