A bit about AllanHear One: I work full time as a educational technology project manager, but I'm also a PhD candidate in Adult Education. I think that really listening to people, including verbal and non-verbal language, can be extremely useful in both of these roles.
Do One: I'm a big believer in the learning-by-doing philosophy. For example, I thought I knew a lot about podcasting until I started doing a podcast. When you actively experiment, you marry theory to practice and see the messiness that reality introduces. This process also helps to reveal your own weaknesses so you can work on them.
Teach One: I love teaching, probably because I love seeing other people stretch themselves and learn. I also think that teaching something to someone else is the best way of learning it in depth. The fresh perspective of a student always helps me to see a topic in a new light.