Dr.Tom Stafford is a lecturer in psychology and cognitive science at the University of Sheffield. He explains why the way you practice affects how good you get at something - and he's got 850,000 people to back him up.
Axon game: http://axon.wellcomeapps.com/
Github: https://github.com/tomstafford/axongame
Tom's blog: http://www.tomstafford.staff.shef.ac.uk/?p=221
Tom on Twitter: https://twitter.com/tomstafford