Take a look at this feature from Women's Wear Daily about how to cuff your jeans. Such an easy way to add a touch of flair to your everyday denim and a great "transitional wear" look. Personally, I love ankle-length pants, so this an ideal scenario for me!
Here's an easy two step formula:
Step 1: Grasp a bottom hem and fold it vertically so there's a 1/2-inch tuck in front.
Step 2: Hold the tuck in place while you roll up the hem by about two inches wide. Repeat with the other leg.