The "Tight Roll"

Get a skinny, tapered look even if your jeans aren't.

Fold the hem of your jeans over once so that it's tight around your ankle, then roll upwards twice, so you get a snug wrap.
With slightly more relaxed fitting jeans, you get a nice carrot shape leg. With skinny jeans, you get a more cropped, pegged look.
This style cuff is good for keeping the hem of your pants up high if you want to show off some fresh socks or new kicks.