Spring 2011 is somewhat channeling 2010 in structure. Platforms are a must: strappy, sporty, Oxford-y, or even "flat." This spring, though, you might want something, well, a little mixed up.
Combining textures, patterns, styles and materials is big. Look at mixed-media fabrics, varied snake prints, sporty white sneaker-types on a 4-inch heel, florals on a sculpted wood block, patent and flat leather crisscrossing straps, or desert-tone metallic suede, 2 inches tall from front to back (the platform "flat" -- easy walking).
You'll gain some height no matter what, so this could be the season you won't have to shorten your new pair of jeans (which, for all you non-size-zeroes out there, do not have to be skinny anymore!).
Finally, you may want to learn to travel light …