I've been training in the martial arts for something around five years. The style I study borrows from all sorts of other styles, including aikido, but there has never been a great deal of emphasis on ki. What kinds of exercises/meditation should I do to strengthen my ki, learn to control it, sense it in others, etc?
Ehh... Kokyo ho, according to "Budo." Learn it from somebody who'll infuriate you and make you laugh by effortlessly scratching their face while you try to hold their hands down.