Jungling

The best ways to learn is by watching it being done by experienced players.

http://www.twitch.tv/trick2g http://www.twitch.tv/tsm_theoddone http://www.twitch.tv/tsm_santorin

There are others, but these are the jungle streamers I watch. They explain what they're doing and explain why things turn out good or bad and what could have happened for it to be better. Watch what they do and try to remember what you saw, look up what runes and masteries they use for their preferred picks, what they build depending on the situation, and try to mimic it.

If you don't have time to watch livestreams, or their streaming schedule doesn't fit with your work/sleep schedule, see what you can find on http://www.solomid.net/