[RedGreenCode]

Solving programming puzzles (or competitive programming) is a good basis for a deliberate practice plan. There are a lot of sites that provide puzzles of increasing difficulty. So you can work on problems slightly above your current level, which is one of the tenets of DP.

I wrote a blog post on this topic with more details on a specific process: http://www.redgreencode.com/deliberate-practice-for-software...

Khan Academy is a reasonable way to start learning programming, but like other learning sites (Codecademy and others) they focus on learning things the first time, and not as much on getting better. CodingBat (http://codingbat.com/) takes a more drill-oriented approach, which is more effective for learning the basics well. But there's not a lot of content there, in comparison with a puzzle site like SPOJ (http://www.spoj.com/).