As I probably mentioned before besides personal and face to face encounters with inspiring people Twitter is my preferable way to get good and very individualised PD. Many Twitter users already shared how they use Twitter to get inspired, to think out of the box, to share, to comment, to communicate, to exchange knowledge, to make other people think, to provoke, to encourage, to stimulate … yes, all those things Twitter can do to you.
The only thing I like more than teaching is learning. 