Perhaps the best place to get the kind of professional development you are actually looking for is online. Most of that content is going to be passive. That is, you will simply read, watch or listen to something that will improve your performance.Some of it will allow you to interact. Much of this includes the social networks such as Linkedin or Google plus.
Once in a while you will run into something that is designed to actually learn your preferences and deliver content that suites you and your interests. Netflix works this way. It suggests films you may like based on what you have watched in the past. I regularly use an app called Zite. This is a free, personalized iPad app which learns your preferences and scours the internet for stories and articles that you are likely to enjoy reading.
There is so much out there, each and every person can find a good way to learn anything you like for free!