TED is a not-for-profit organization devoted to ideas worth spreading. Through its conferences it brings together inspiring individuals to talk for not more than 17-18 minutes on diverse areas including Technology, Entertainment and Design. The speakers include celebrities, academicans, researchers, politicains, social activists, authors and just about anybody who has an interesting tale to narrate.
TED Talks are the most valuable 18 minutes that you would ever spend. Their website TED.com or their APP on (iphone, iPAD, Android) lets you enjoy these talks which are absolutely free. Try it, and I promise you that you will love it.
Try this one for starters: Aparna Rao: High-tech art (with a sense of humor)